Edit History

Department breakdown-wise, you're looking at Deck and Engineering being the largest departments. Boatswains and Engineers/Technicians will be your largest share of crew compliment, regardless of the size and mission profile of your vessel.

Equipment-wise, think redundancy. Every ship will have at least 4 independently operable engines/alternators that can propel the ship and generate power within it's "powerplant" (hint: the ONE engine core per ship you see on Star Trek is not safe to naval standards), plus the capability of making/filtering fresh water, processing waste (gray and black water), and at least storing, if not compacting/incinerating solid waste. Life support (ie. making/circulating/filtering/recycling breathable air).

Same thing, should primary steering control (typically located on the bridge) fail, there should be emergency steering controls available to the crew, typically in a space under the domain of the engineering department. There should also be a way for the ship to steer by engine, and by rudder (or in our space age equivalent, "thrusters"). Those systems need to be separate.

There needs to be systems in place to distribute power that's generated to various systems/components that need them. This is also separate from the power that propels the ship. This power distribution (in our case electricity) network needs to have redundancies. ie, let's say your ship is torpedoed, and you've lost a section of a deck, it likely also has hidden within its struture (under the deck plates and/or behind the bulkheads) part of the electrical grid that supplies power to some other part of the ship (unless it's the absolutely foremost or aftmost section of the deck), so power would be cut off to any section that this part of the grid would supply, until bypasses can be installed on the grid.

Fuel-wise, depends on your specific fuel. In our current world of diesel powered ship engines, there's typically no less than 2 storage tanks for "fuel oil", storage tanks for bilge (dirty oil/water mix), freshwater, grey water (non-toilet waste), and blackwater (toilet waste). Larger vessels have treatment plants for grey and black.

And because of the need to balance the vessel and keep it moving in the direction we want, there needs to be balasts that will balance the weight in different parts of the ship. An example of sci-fi's near-equivalent of balasts is Star Trek's "inertial dampeners".

There should be heads (toilets) and washplaces (shower stalls) for crew. Approximately 1 head and 1 washplace per 6-8 crew members. Same, there should be cabins/quarters for crew, with sufficient bunkspace (beds) and lockers for them to keep their personal belongings and operational gear. Depending on how overcapacity the vessel may be, some crew may have to "hot bunk" (ie. share a bed with another person that's on a different watch, so they are not sleeping together in the same bunk at the same time).

CO will have their own dedicated quarters, office, and heads. Various departments/department heads should also have office space. For example, MSE (marine systems engineering), CSE (combat systems engineering), Hull Tech, Clerks & Supply Techs, Chief Cook, all typically have their own offices. I may be missing some others that I can't currently recall.

On top of active equipment in use, there should also be capacity for additional operational equipment to be stowed, whether this is weapons, sensors, extra components, workshops/maintenance space/fabrication space, etc.

If the purpose of the vessel is that of a carrier, there obviously needs to be a hanger and a flight deck as well.

One galley can feed the whole ship, but it needs to be of sufficient size, along with refrigeration / dry storage spaces to boot. Depending on the design of the vessel, the mess/cafeteria spaces may be separated between ranks, or it may be combined.

Firefighting equipment, flood and damage control equipment. Sickbay and casualty clearing. Ship abandonment capabilities (life boats / escape pods / etc).

Small boats for various utility/mission capabilities, plus the capacity to store them and capability to launch/recover/operate them. If they use a different fuel for example (most RHIBs use gasoline for their engines and do not take diesel), there needs to be safe storage for that too.

Towing. Docking. Resupply (ie. Pumping systems embark fuel and freshwater, discharge grey and black water and bilge, elevators and/or cranes sometimes to bring various heavy equipment and/or supplies onboard/between decks).

Hope that gives some perspective.

Department breakdown-wise, you're looking at Deck and Engineering being the largest departments. Boatswains and Engineers/Technicians will be your largest share of crew compliment, regardless of the size and mission profile of your vessel.

Equipment-wise, think redundancy. Every ship will have at least 4 independently operable engines/alternators that can propel the ship and generate power within it's "powerplant" (hint: the ONE engine core per ship you see on Star Trek is not safe to naval standards), plus the capability of making/filtering fresh water, processing waste (gray and black water), and at least storing, if not compacting/incinerating solid waste. Life support (ie. making/circulating/filtering/recycling breathable air).

Same thing, should primary steering control (typically located on the bridge) fail, there should be emergency steering controls available to the crew, typically in a space under the domain of the engineering department. There should also be a way for the ship to steer by engine, and by rudder (or in our space age equivalent, "thrusters"). Those systems need to be separate.

There needs to be systems in place to distribute power that's generated to various systems/components that need them. This is also separate from the power that propels the ship. This power distribution (in our case electricity) network needs to have redundancies. ie, let's say your ship is torpedoed, and you've lost a section of a deck, it likely also has hidden within its struture (under the deck plates and/or behind the bulkheads) part of the electrical grid that supplies power to some other part of the ship (unless it's the absolutely foremost or aftmost section of the deck), so power would be cut off to any section that this part of the grid would supply, until bypasses can be installed on the grid.

Fuel-wise, depends on your specific fuel. In our current world of diesel powered ship engines, there's typically no less than 2 storage tanks for "fuel oil", storage tanks for bilge (dirty oil/water mix), freshwater, grey water (non-toilet waste), and blackwater (toilet waste). Larger vessels have treatment plants for grey and black.

And because of the need to balance the vessel and keep it moving in the direction we want, there needs to be balasts that will balance the weight in different parts of the ship. An example of sci-fi's near-equivalent of balasts is Star Trek's "inertial dampeners".

There should be heads (toilets) and washplaces (shower stalls) for crew. Approximately 1 head and 1 washplace per 6-8 crew members. Same, there should be cabins/quarters for crew, with sufficient bunkspace (beds) and lockers for them to keep their personal belongings and operational gear. Depending on how overcapacity the vessel may be, some crew may have to "hot bunk" (ie. share a bed with another person that's on a different watch, so they are not sleeping together in the same bunk at the same time).

CO will have their own dedicated quarters, office, and heads. Various departments/department heads should also have office space. For example, MSE (marine systems engineering), CSE (combat systems engineering), Hull Tech, Clerks & Supply Techs, Chief Cook, all typically have their own offices. I may be missing some others that I can't currently recall.

On top of active equipment in use, there should also be capacity for additional operational equipment to be stowed, whether this is weapons, sensors, extra components, workshops/maintenance space/fabrication space, etc.

If the purpose of the vessel is that of a carrier, there obviously needs to be a hanger and a flight deck as well.

One galley can feed the whole ship, but it needs to be of sufficient size, along with refrigeration / dry storage spaces to boot. Depending on the design of the vessel, the mess/cafeteria spaces may be separated between ranks, or it may be combined.

Firefighting equipment, flood and damage control equipment. Sickbay and casualty clearing. Ship abandonment capabilities (life boats / escape pods / etc).

Small boats for various utility/mission capabilities, plus the capacity to store them and capability to launch/recover/operate them. If they use a different fuel for example (most RHIBs use gasoline for their engines and do not take diesel), there needs to be safe storage for that too.

Towing. Docking. Resupply (ie. Pumping systems embark fuel and freshwater, discharge grey and black water and bilge, elevators and/or cranes sometimes to bring various heavy equipment and/or supplies onboard/between decks).

Department breakdown-wise, you're looking at Deck and Engineering being the largest departments. Boatswains and Engineers/Technicians will be your largest share of crew compliment, regardless of the size and mission profile of your vessel.

Equipment-wise, think redundancy. Every ship will have at least 4 independently operable engines/alternators that can propel the ship and generate power within it's "powerplant" (hint: the ONE engine core per ship you see on Star Trek is not safe to naval standards), plus the capability of making/filtering fresh water, processing waste (gray and black water), and at least storing, if not compacting/incinerating solid waste. Life support (ie. making/circulating/filtering/recycling breathable air).

Same thing, should primary steering control (typically located on the bridge) fail, there should be emergency steering controls available to the crew, typically in a space under the domain of the engineering department. There should also be a way for the ship to steer by engine, and by rudder (or in our space age equivalent, "thrusters"). Those systems need to be separate.

There needs to be systems in place to distribute power that's generated to various systems/components that need them. This is also separate from the power that propels the ship. This power distribution (in our case electricity) network needs to have redundancies. ie, let's say your ship is torpedoed, and you've lost a section of a deck, it likely also has hidden within its struture (under the deck plates and/or behind the bulkheads) part of the electrical grid that supplies power to some other part of the ship (unless it's the absolutely foremost or aftmost section of the deck), so power would be cut off to any section that this part of the grid would supply, until bypasses can be installed on the grid.

Fuel-wise, depends on your specific fuel. In our current world of diesel powered ship engines, there's typically no less than 2 storage tanks for "fuel oil", storage tanks for bilge (dirty oil/water mix), freshwater, grey water (non-toilet waste), and blackwater (toilet waste). Larger vessels have treatment plants for grey and black.

And because of the need to balance the vessel and keep it moving in the direction we want, there needs to be balasts that will balance the weight in different parts of the ship. An example of sci-fi's near-equivalent of balasts is Star Trek's "inertial dampeners".

There should be heads (toilets) and washplaces (shower stalls) for crew. Approximately 1 head and 1 washplace per 6-8 crew members. Same, there should be cabins/quarters for crew, with sufficient bunkspace (beds) and lockers for them to keep their personal belongings and operational gear. Depending on how overcapacity the vessel may be, some crew may have to "hot bunk" (ie. share a bed with another person that's on a different watch, so they are not sleeping together in the same bunk at the same time).

CO will have their own dedicated quarters, office, and heads. Various departments/department heads should also have office space. For example, MSE (marine systems engineering), CSE (combat systems engineering), Hull Tech, Clerks & Supply Techs, Chief Cook, all typically have their own offices. I may be missing some others that I can't currently recall.

On top of active equipment in use, there should also be capacity for additional operational equipment to be stowed, whether this is weapons, sensors, extra components, workshops/fabrication space, etc.

If the purpose of the vessel is that of a carrier, there obviously needs to be a hanger and a flight deck as well.

One galley can feed the whole ship, but it needs to be of sufficient size, along with refrigeration / dry storage spaces to boot. Depending on the design of the vessel, the mess/cafeteria spaces may be separated between ranks, or it may be combined.

Firefighting equipment, flood and damage control equipment. Sickbay and casualty clearing. Ship abandonment capabilities (life boats / escape pods / etc).

Small boats for various utility/mission capabilities, plus the capacity to store them and capability to launch/recover/operate them. If they use a different fuel for example (most RHIBs use gasoline for their engines and do not take diesel), there needs to be safe storage for that too.

Towing. Docking. Resupply (ie. Pumping systems embark fuel and freshwater, discharge grey and black water and bilge, elevators and/or cranes sometimes to bring various heavy equipment and/or supplies onboard/between decks).

Department breakdown-wise, you're looking at Deck and Engineering being the largest departments. Boatswains and Engineers/Technicians will be your largest share of crew compliment, regardless of the size and mission profile of your vessel.

Equipment-wise, think redundancy. Every ship will have at least 4 independently operable engines/alternators that can propel the ship and generate power within it's "powerplant" (hint: the ONE engine core per ship you see on Star Trek is not safe to naval standards), plus the capability of making/filtering fresh water, processing waste (gray and black water), and at least storing, if not compacting/incinerating solid waste. Life support (ie. making/circulating/filtering/recycling breathable air).

Same thing, should primary steering control (typically located on the bridge) fail, there should be emergency steering controls available to the crew, typically in a space under the domain of the engineering department. There should also be a way for the ship to steer by engine, and by rudder (or in our space age equivalent, "thrusters"). Those systems need to be separate.

There needs to be systems in place to distribute power that's generated to various systems/components that need them. This is also separate from the power that propels the ship. This power distribution (in our case electricity) network needs to have redundancies. ie, let's say your ship is torpedoed, and you've lost a section of a deck, it likely also has hidden within its struture (under the deck plates and/or behind the bulkheads) part of the electrical grid that supplies power to some other part of the ship (unless it's the absolutely foremost or aftmost section of the deck), so power would be cut off to any section that this part of the grid would supply, until bypasses can be installed on the grid.

Fuel-wise, depends on your specific fuel. In our current world of diesel powered ship engines, there's typically no less than 2 storage tanks for "fuel oil", storage tanks for bilge (dirty oil/water mix), freshwater, grey water (non-toilet waste), and blackwater (toilet waste). Larger vessels have treatment plants for grey and black.

And because of the need to balance the vessel and keep it moving in the direction we want, there needs to be balasts that will balance the weight in different parts of the ship. An example of sci-fi's near-equivalent of balasts is Star Trek's "inertial dampeners".

There should be heads (toilets) and washplaces (shower stalls) for crew. Approximately 1 head and 1 washplace per 6-8 crew members. Same, there should be cabins/quarters for crew, with sufficient bunkspace (beds) and lockers for them to keep their personal belongings and operational gear. Depending on how overcapacity the vessel may be, some crew may have to "hot bunk" (ie. share a bed with another person that's on a different watch, so they are not sleeping together in the same bunk at the same time).

CO will have their own dedicated quarters, office, and heads. Various departments/department heads should also have office space. For example, MSE (marine systems engineering), CSE (combat systems engineering), Hull Tech, Clerks & Supply Techs, Chief Cook, all typically have their own offices. I may be missing some others that I can't currently recall.

On top of active equipment in use, there should also be capacity for additional operational equipment to be stowed, whether this is weapons, sensors, extra components, workshops/fabrication space, etc.

If the purpose of the vessel is that of a carrier, there obviously needs to be a hanger and a flight deck as well.

One galley can feed the whole ship, but it needs to be of sufficient size, along with refrigeration / dry storage spaces to boot. Depending on the design of the vessel, the mess/cafeteria spaces may be separated between ranks, or it may be combined.

Firefighting equipment, flood and damage control equipment. Sickbay and casualty clearing. Ship abandonment capabilities (life boats / escape pods / etc).

Small boats for various utility/mission capabilities, plus the capacity to store them and capability to launch/recover them. Towing. Docking. Resupply (ie. Pumping systems embark fuel and freshwater, discharge grey and black water and bilge, elevators and/or cranes sometimes to bring various heavy equipment and/or supplies onboard/between decks).

Department breakdown-wise, you're looking at Deck and Engineering being the largest departments. Boatswains and Engineers/Technicians will be your largest share of crew compliment, regardless of the size and mission profile of your vessel.

Equipment-wise, think redundancy. Every ship will have at least 4 independently operable engines/alternators that can propel the ship and generate power within it's "powerplant" (hint: the ONE engine core per ship you see on Star Trek is not safe to naval standards), plus the capability of making/filtering fresh water, processing waste (gray and black water), and at least storing, if not compacting/incinerating solid waste. Life support (ie. making/circulating/filtering/recycling breathable air).

Same thing, should primary steering control (typically located on the bridge) fail, there should be emergency steering controls available to the crew, typically in a space under the domain of the engineering department. There should also be a way for the ship to steer by engine, and by rudder (or in our space age equivalent, "thrusters"). Those systems need to be separate.

Fuel-wise, depends on your specific fuel. In our current world of diesel powered ship engines, there's typically no less than 2 storage tanks for "fuel oil", storage tanks for bilge (dirty oil/water mix), freshwater, grey water (non-toilet waste), and blackwater (toilet waste). Larger vessels have treatment plants for grey and black.

And because of the need to balance the vessel and keep it moving in the direction we want, there needs to be balasts that will balance the weight in different parts of the ship. An example of sci-fi's near-equivalent of balasts is Star Trek's "inertial dampeners".

There should be heads (toilets) and washplaces (shower stalls) for crew. Approximately 1 head and 1 washplace per 6-8 crew members. Same, there should be cabins/quarters for crew, with sufficient bunkspace (beds) and lockers for them to keep their personal belongings and operational gear. Depending on how overcapacity the vessel may be, some crew may have to "hot bunk" (ie. share a bed with another person that's on a different watch, so they are not sleeping together in the same bunk at the same time).

CO will have their own dedicated quarters, office, and heads. Various departments/department heads should also have office space. For example, MSE (marine systems engineering), CSE (combat systems engineering), Hull Tech, Clerks & Supply Techs, Chief Cook, all typically have their own offices. I may be missing some others that I can't currently recall.

On top of active equipment in use, there should also be capacity for additional operational equipment to be stowed, whether this is weapons, sensors, extra components, workshops/fabrication space, etc.

If the purpose of the vessel is that of a carrier, there obviously needs to be a hanger and a flight deck as well.

One galley can feed the whole ship, but it needs to be of sufficient size, along with refrigeration / dry storage spaces to boot. Depending on the design of the vessel, the mess/cafeteria spaces may be separated between ranks, or it may be combined.

Firefighting equipment, flood and damage control equipment. Sickbay and casualty clearing. Ship abandonment capabilities (life boats / escape pods / etc).

Small boats for various utility/mission capabilities, plus the capacity to store them and capability to launch/recover them. Towing. Docking. Resupply (ie. Pumping systems embark fuel and freshwater, discharge grey and black water and bilge, elevators and/or cranes sometimes to bring various heavy equipment and/or supplies onboard/between decks).

Department breakdown-wise, you're looking at Deck and Engineering being the largest departments. Boatswains and Engineers/Technicians will be your largest share of crew compliment, regardless of the size and mission profile of your vessel.

Equipment-wise, think redundancy. Every ship will have at least 4 independently operable engines/alternators that can propel the ship and generate power within it's "powerplant" (hint: the ONE engine core per ship you see on Star Trek is not safe to naval standards), plus the capability of making/filtering fresh water, processing waste (gray and black water), and at least storing, if not compacting/incinerating solid waste. Life support (ie. making/circulating/filtering/recycling breathable air).

Same thing, should primary steering control (typically located on the bridge) fail, there should be emergency steering controls available to the crew, typically in a space under the domain of the engineering department. There should also be a way for the ship to steer by engine, and by rudder (or in our space age equivalent, "thrusters"). Those systems need to be separate.

Fuel-wise, depends on your specific fuel. In our current world of diesel powered ship engines, there's typically no less than 2 storage tanks for "fuel oil", storage tanks for bilge (dirty oil/water mix), freshwater, grey water (non-toilet waste), and blackwater (toilet waste). Larger vessels have treatment plants for grey and black.

And because of the need to balance the vessel and keep it moving in the direction we want, there needs to be balasts that will balance the weight in different parts of the ship. An example of sci-fi's near-equivalent of balasts is Star Trek's "inertial dampeners".

There should be heads (toilets) and washplaces (shower stalls) for crew. Approximately 1 head and 1 washplace per 6-8 crew members. Same, there should be cabins/quarters for crew, with sufficient bunkspace (beds) and lockers for them to keep their personal belongings and operational gear. Depending on how overcapacity the vessel may be, some crew may have to "hot bunk" (ie. share a bed with another person that's on a different watch, so they are not sleeping together in the same bunk at the same time).

CO will have their own dedicated quarters, office, and heads. Various departments/department heads should also have office space. For example, MSE (marine systems engineering), CSE (combat systems engineering), Hull Tech, Clerks & Supply Techs, Chief Cook, all typically have their own offices. I may be missing some others that I can't currently recall.

On top of active equipment in use, there should also be capacity for additional operational equipment to be stowed, whether this is weapons, sensors, extra components, workshops/fabrication space, etc.

If the purpose of the vessel is that of a carrier, there obviously needs to be a hanger and a flight deck as well.

One galley can feed the whole ship, but it needs to be of sufficient size, along with refrigeration / dry storage spaces to boot. Depending on the design of the vessel, the mess/cafeteria spaces may be separated between ranks, or it may be combined.

Firefighting equipment, flood and damage control equipment. Sickbay and casualty clearing. Ship abandonment capabilities (life boats / escape pods / etc). Small boats for various utility/mission capabilities, plus the capacity to store them and capability to launch/recover them. Towing. Docking.

Department breakdown-wise, you're looking at Deck and Engineering being the largest departments. Boatswains and Engineers/Technicians will be your largest share of crew compliment, regardless of the size and mission profile of your vessel.

Equipment-wise, think redundancy. Every ship will have at least 4 independently operable engines/alternators that can propel the ship and generate power within it's "powerplant" (hint: the ONE engine core per ship you see on Star Trek is not safe to naval standards), plus the capability of making/filtering fresh water, processing waste (gray and black water), and at least storing, if not compacting/incinerating solid waste. Life support (ie. making/circulating/filtering/recycling breathable air).

Same thing, should primary steering control (typically located on the bridge) fail, there should be emergency steering controls available to the crew, typically in a space under the domain of the engineering department. There should also be a way for the ship to steer by engine, and by rudder (or in our space age equivalent, "thrusters"). Those systems need to be separate.

Fuel-wise, depends on your specific fuel. In our current world of diesel powered ship engines, there's typically no less than 2 storage tanks for "fuel oil", storage tanks for bilge (dirty oil/water mix), freshwater, grey water (non-toilet waste), and blackwater (toilet waste). Larger vessels have treatment plants for grey and black.

And because of the need to balance the vessel and keep it moving in the direction we want, there needs to be balasts that will balance the weight in different parts of the ship. An example of sci-fi's near-equivalent of balasts is Star Trek's "inertial dampeners".

There should be heads (toilets) and washplaces (shower stalls) for crew. Approximately 1 head and 1 washplace per 6-8 crew members. Same, there should be cabins/quarters for crew, with sufficient bunkspace (beds) and lockers for them to keep their personal belongings and operational gear. Depending on how overcapacity the vessel may be, some crew may have to "hot bunk" (ie. share a bed with another person that's on a different watch, so they are not sleeping together in the same bunk at the same time).

CO will have their own dedicated quarters, office, and heads. Various departments/department heads should also have office space. For example, MSE (marine systems engineering), CSE (combat systems engineering), Hull Tech, Clerks & Supply Techs, Chief Cook, all typically have their own offices. I may be missing some others that I can't currently recall.

On top of active equipment in use, there should also be capacity for additional operational equipment to be stowed, whether this is weapons, sensors, extra components, workshops/fabrication space, etc.

If the purpose of the vessel is that of a carrier, there obviously needs to be a hanger and a flight deck as well.

One galley can feed the whole ship, but it needs to be of sufficient size, along with refrigeration / dry storage spaces to boot. Depending on the design of the vessel, the mess/cafeteria spaces may be separated between ranks, or it may be combined.

Firefighting equipment, flood and damage control equipment. Sickbay and casualty clearing. Ship abandonment capabilities (life boats / escape pods / etc).

Department breakdown-wise, you're looking at Deck and Engineering being the largest departments. Boatswains and Engineers/Technicians will be your largest share of crew compliment, regardless of the size and mission profile of your vessel.

Equipment-wise, think redundancy. Every ship will have at least 4 independently operable engines/alternators that can propel the ship and generate power within it's "powerplant" (hint: the ONE engine core per ship you see on Star Trek is not safe to naval standards), plus the capability of making/filtering fresh water, processing waste (gray and black water), and at least storing, if not compacting/incinerating solid waste. Life support (ie. making/circulating/filtering/recycling breathable air).

Same thing, should primary steering control (typically located on the bridge) fail, there should be emergency steering controls available to the crew, typically in a space under the domain of the engineering department. There should also be a way for the ship to steer by engine, and by rudder (or in our space age equivalent, "thrusters"). Those systems need to be separate.

There should be heads (toilets) and washplaces (shower stalls) for crew. Approximately 1 head and 1 washplace per 6-8 crew members. Same, there should be cabins/quarters for crew, with sufficient bunkspace (beds) and lockers for them to keep their personal belongings and operational gear. Depending on how overcapacity the vessel may be, some crew may have to "hot bunk" (ie. share a bed with another person that's on a different watch, so they are not sleeping together in the same bunk at the same time).

CO will have their own dedicated quarters, office, and heads. Various departments/department heads should also have office space. For example, MSE (marine systems engineering), CSE (combat systems engineering), Hull Tech, Clerks & Supply Techs, Chief Cook, all typically have their own offices. I may be missing some others that I can't currently recall.

On top of active equipment in use, there should also be capacity for additional operational equipment to be stowed, whether this is weapons, sensors, extra components, workshops/fabrication space, etc.

If the purpose of the vessel is that of a carrier, there obviously needs to be a hanger and a flight deck as well.

One galley can feed the whole ship, but it needs to be of sufficient size, along with refrigeration / dry storage spaces to boot. Depending on the design of the vessel, the mess/cafeteria spaces may be separated between ranks, or it may be combined.

Firefighting equipment, flood and damage control equipment. Sickbay and casualty clearing. Ship abandonment capabilities (life boats / escape pods / etc).

Department breakdown-wise, you're looking at Deck and Engineering being the largest departments. Boatswains and Engineers/Technicians will be your largest share of crew compliment, regardless of the size and mission profile of your vessel.

Equipment-wise, think redundancy. Every ship will have at least 4 independently operable engines/alternators that can propel the ship and generate power within it's "powerplant" (hint: the ONE engine core per ship you see on Star Trek is not safe to naval standards), plus the capability of making/filtering fresh water, processing waste (gray and black water), and at least storing, if not compacting/incinerating solid waste. Life support (ie. making/circulating/filtering/recycling breathable air).

Same thing, should primary steering control (typically located on the bridge) fail, there should be emergency steering controls available to the crew, typically in a space under the domain of the engineering department. There should also be a way for the ship to steer by engine, and by rudder (or in our space age equivalent, "thrusters"). Those systems need to be separate.

There should be heads (toilets) and washplaces (shower stalls) for crew. Approximately 1 head and 1 washplace per 6-8 crew members. Same, there should be cabins/quarters for crew, with sufficient bunkspace (beds) and lockers for them to keep their personal belongings and operational gear. Depending on how overcapacity the vessel may be, some crew may have to "hot bunk" (ie. share a bed with another person that's on a different watch, so they are not sleeping together in the same bunk at the same time).

CO will have their own dedicated quarters, office, and heads. Various departments/department heads should also have office space. For example, MSE (marine systems engineering), CSE (combat systems engineering), Hull Tech, Clerks & Supply Techs, Chief Cook, all typically have their own offices. I may be missing some others that I can't currently recall.

On top of active equipment in use, there should also be capacity for additional operational equipment to be stowed, whether this is weapons, sensors, extra components, workshops/fabrication space, etc.

If the purpose of the vessel is that of a carrier, there obviously needs to be a hanger and a flight deck as well.

Firefighting equipment, flood and damage control equipment. Sickbay and casualty clearing. Ship abandonment capabilities (life boats / escape pods / etc).

Department breakdown-wise, you're looking at Deck and Engineering being the largest departments. Boatswains and Engineers/Technicians will be your largest share of crew compliment, regardless of the size and mission profile of your vessel.

Equipment-wise, think redundancy. Every ship will have at least 4 independently operable engines/alternators that can propel the ship and generate power within it's "powerplant" (hint: the ONE engine core per ship you see on Star Trek is not safe to naval standards), plus the capability of making/filtering fresh water, processing waste (gray and black water), and at least storing, if not compacting/incinerating solid waste.

Same thing, should primary steering control (typically located on the bridge) fail, there should be emergency steering controls available to the crew, typically in a space under the domain of the engineering department. There should also be a way for the ship to steer by engine, and by rudder (or in our space age equivalent, "thrusters"). Those systems need to be separate.

There should be heads (toilets) and washplaces (shower stalls) for crew. Approximately 1 head and 1 washplace per 6-8 crew members. Same, there should be cabins/quarters for crew, with sufficient bunkspace (beds) and lockers for them to keep their personal belongings and operational gear. Depending on how overcapacity the vessel may be, some crew may have to "hot bunk" (ie. share a bed with another person that's on a different watch, so they are not sleeping together in the same bunk at the same time).

CO will have their own dedicated quarters, office, and heads. Various departments/department heads should also have office space. For example, MSE (marine systems engineering), CSE (combat systems engineering), Hull Tech, Clerks & Supply Techs, Chief Cook, all typically have their own offices. I may be missing some others that I can't currently recall.

On top of active equipment in use, there should also be capacity for additional operational equipment to be stowed, whether this is weapons, sensors, extra components, workshops/fabrication space, etc.

If the purpose of the vessel is that of a carrier, there obviously needs to be a hanger and a flight deck as well.

Firefighting equipment, flood and damage control equipment. Sickbay and casualty clearing.