ballast tank
Buoyancy control reservoir
A ballast tank is a compartment in a ship or submarine that can be filled with water or emptied to adjust buoyancy and stability.
Submarines submerge by flooding their ballast tanks and surface by forcing water out with compressed air.
Ships use ballast tanks to maintain proper draft and balance when sailing without cargo.
Removal from usual location
- waterlineLevel water reaches
- draftPreliminary version of text
- freeboardHull above water level
- hydrostaticsScience of stationary fluid pressures
neutral buoyancy · Archimedes · upthrust · floatation · load line · immersion · submersion · density
Overwhelming water overflow
- blowMove air forcefully
- ventOpening for airflow
- submergePlunge beneath liquid
- surfaceOutermost boundary layer
trim · equalize · pressure hull · torpedo tube · control room · sonar · periscope · conning tower
Outer covering or frame
- bilgeShip's water-collecting depths
- bulkheadInternal vessel barrier
- watertightPrevents liquid from passing
- compartmentEnclosed subdivision of space
pump · valve · floodable · seacock · piping · drain · cargo hold · dry dock
Hull's structural base
- yachtLarge pleasure vessel
- cruisingMoving at relaxed pace
- monohullVessel with one hull
- heelingLeaning to one side
righting · offshore · passage · heavy weather
Remove unwanted edges
- equilibriumState of balance
- counterweightBalancing mass in machinery
- balanceSteadiness or amount owed
- center of gravityEquilibrium point of mass
list · heel · weight distribution · seaworthiness · leveling
displacement
Removal from usual location
hydrostatics · neutral buoyancy · Archimedes · upthrust · floatation · load line · immersion · submersion · density
flood
Overwhelming water overflow
surface · trim · equalize · pressure hull · torpedo tube · control room · sonar · periscope · conning tower · hatch
hull
Outer covering or frame
- bilgeShip's water-collecting depths
- bulkheadInternal vessel barrier
- watertightPrevents liquid from passing
compartment · pump · valve · floodable · seacock · piping · drain · cargo hold · dry dock · shipyard
keel
Hull's structural base
heeling · righting · offshore · passage · heavy weather
trim
Remove unwanted edges
- equilibriumState of balance
- counterweightBalancing mass in machinery
- balanceSteadiness or amount owed
center of gravity · list · heel · weight distribution · seaworthiness · leveling
ballast tankfuel tank
Container for combustible liquid
cargo hold · freshwater tank · propulsion system · engine room
tanks, tanked, tanker, ballast, tank, tankful, tankers, ballasted, ballasts