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[[Category:Technology]]
“Ship” is out of fashion as a term for
spacecraft; “spacecraft,” “vessel,” and
“space vehicle” are preferred. The most
ardent exponent of this nomenclature is the
USAF, adamant that “ships” are what the
U.S. Navy operates.

New spacecraft often cost $100 million
or more. A few individuals or partnerships
own one, but corporations or
governments own most of them. However,
even in company-owned craft, a
crew might be assigned to a particular
vessel and stay with it for several years,
only gradually changing in composition
as individuals leave and new members are
reassigned or hired.

Most spacecraft are propelled by
reaction drives. They work on the Newtonian
principle that for every action,
there is an equal and opposite reaction. A
drive throws reaction mass, usually heated
to give it extra energy, in one direction,
and the reaction accelerates the spacecraft
in the opposite direction. On a long voyage,
a vessel will accelerate for several
hours until it has used up around half of its
reserve of reaction mass, then coast at
whatever speed it has achieved for several
days, and finally spend the other half of
its reaction mass to slow down.

Most modern interplanetary
spacecraft use fusion drives, which accelerate
slowly but are efficient enough that
a vessel can achieve a high speed over
many hours without running out of reaction
mass. Fusion drives lack sufficient
thrust to overcome the gravity of a decent-size
planet or moon, so these deep-space
vessels park in orbit and use craft with
higher-thrust but shorter-endurance
chemical or fission rocket engines to shuttle
to and from the surface.

Interplanetary trips typically take a
couple of weeks in the inner solar system,
or a few months to cross the outer system.
Spacecraft are large – hundreds of feet
long – but crews are quite small: 2-12
people is typical. Large passenger vessels
have rotating sections to provide spin
gravity, but most other spacecraft are in
zero gravity for the majority of the trip.
Crews are zero-G-adapted parahumans,
or have nanosymbionts to keep them in
good health; passengers take temp nanomods, exercise
rigorously, or shut down their metabolisms altogether
and spend the trip carried as cargo in nanostasis.

Space crews are busiest at the start and end of a voyage,
when the drive is hot and they’re near a port bustling
with traffic and surrounded by space junk. In deep space,
with the drive cold and the vessel coasting, there’s less to
do. Routine maintenance is usually handled by microbots
or cybershells.

Light-lag means they cannot access the Web at realtime
speeds, but slinkies, entertainment, mail, etc. can be
downloaded. Crews take up hobbies or study, and war
crews run battle simulations. A pet, often uplifted, is not
uncommon. Some vessels are loose about intracrew relationships,
handling any difficulties informally. Others,
mostly big companies and the military, have strict “no
fraternization” rules (but some crews acquire pleasure
bioroids, bioshells, or cyberdolls). A few vessels are family-
operated, especially Gypsy Angel craft.

==Spacecraft Types==
*''Autonomous Kill Vehicle (AKV):'' A cybershell space fighter. AKVs are small, fast, and heavily armored. They carry various close-in munitions packs such as a kinetic-kill or nuclear-pumped X-ray laser bombs.
*''Deep Space Operations Vehicle (DSOV):'' These vessels are built to establish far-off outposts or transport major science expeditions. They have fusion drives and lots of reaction mass, and carry plenty of industrial equipment.
*''Executive Space Vehicle (ESV):'' A fusion-drive space yacht, with a few luxury cabins, a staff of bioroids or cybershells, but little cargo.
*''Heavy Lift Vehicle (HLV):'' A single-stage laser rocket (sometimes chemical rocket) designed to transport a load of cargo into space.
*''Heavy Space Transport Vehicle (HSTV):'' The largest fusion-drive interplanetary transports. HSTVs can carry cargo, but are often equipped with external cradles to sling heavier cargo pods into high velocity trajectories. The HSTV then heads for home, and on the other end, a receiver HSTV intercepts and catches the cargo.
*''Orbital Transfer Vehicle (OTV):'' A cheap “space truck” for short-range hops between adjacent orbital facilities, or quick voyages such as Earth orbit to Lunar orbit or L4/L5. Most OTVs use chemical rocket or fission drives. Passenger OTVs lack cabins, instead having airplane-style seating.
*''Passenger Space Vehicle (PSV):'' A fusion-drive “fastliner” with lots of cabins and spin gravity.
*''Remote Survey Vehicle (RSV):'' A cybershell probe controlled by telepresence or on-board AI. Some use fusion drives; others, slow plasma sails.
*''Space Dominance Vehicle (SDV):'' A heavily armored vessel propelled by a fusion or antimatter pulse drive. Armed with particle accelerators, laser irises, and 2-6 AKVs. They often carry a squad of troops.
*''Space Control Vehicle (SCV):'' A carrier designed for planetary assaults. They carry a platoon- to battalion-size force, plus a flight of TAVs.
*''Space Defense Platform (SDP):'' An orbital battle station. These heavily armored vessels range from small warsats to asteroid-sized monitors. They bristle with weapons, but have little or no mobility. Many are uninhabited.
*''Transatmospheric Vehicle (TAV):'' A single-stage-to-orbit cargo or passenger vehicle. Usually powered by chemical or laser rockets, though some TAVs are hybrid craft with air-breathingengines for atmospheric flight.
*''Utility Space Vehicle (USV):'' A generic “freighter” used to carry people, haul cargo, prospect, etc. Usually fusion-powered, but older models may use plasma sails or mass drivers.
*''Work Pod:'' A cheap one- or two-person spacecraft with manipulator arms and a simple chemical-rocket engine.