Definition → Word
Fill in the blank
What would an engineer call it?
What would a navigator call it? (abbreviations give only 100 points)
Three clues
100

This is the rotating shaft that transfers power from the engine to the propeller.

What is a tailshaft?

100

The engineer noticed that the lubricating oil had collected in the engine __________.

What is a sump?

100

A diesel engine uses exhaust-gas energy to drive a device that compresses the intake air before it enters the engine.

What is a turbocharger?

100

Navigators observe the angle between a celestial body and the horizon to help determine the vessel’s position with this tool.

What is a sextant?

100
  • I am part of a ship's seawater system.
  • I am located below the waterline.
  • I allow seawater to enter the ship.

What is a sea chest?

200

This is the distance between the ship's waterline and its main deck.

What is freeboard?

200

The blades of the propeller are attached to the __________.

What is a hub?

200

The engineer discovers that vapor bubbles are forming and collapsing around the propeller, potentially causing noise and damage.

What is cavitation?

200

This powerful sound signal is used to warn nearby vessels when visibility is severely reduced.

What is a fog horn?

200
  • I am a measurement related to ship stability.
  • I involve the center of gravity and the metacenter.
  • A larger positive value generally indicates greater initial stability.

What is metacentric height?

300

This is the depth of a ship below the waterline.

What is draft (draught)?

300

The connecting rod is attached to the __________ of the crankshaft.

What is a crankpin?

300

A rotating shaft controls when the engine's intake and exhaust valves open and close.

What is a camshaft?

300

This system broadcasts and displays data on nearby ships, including their speed, name and destination.

What is an automatic identification system? (AIS)

300
  • I am related to ship stability.
  • I describe a ship leaning to one side.
  • Unlike trim, I concern the port and starboard sides.

What is list?

400

This is the theoretical distance a propeller would move forward during one revolution.

What is propeller pitch?

400

The engineer inspected the __________ because it protects the shaft from wear.

What is a shaft sleeve?

400

A chamber supplies pressurized air to the cylinders of a large two-stroke diesel engine.

What is a scavenge air receiver?

400

This secure "black box" records bridge audio, radar and instrument data for safety and incident analysis.

What is a voyage data recorder? (VDR)

400
  • I remove unwanted substances from fuel.
  • I can separate water from fuel oil.
  • I am important for maintaining engine fuel quality.

What is a fuel oil purifier?

500

This is the difference between the ship's forward and aft drafts.

What is trim?

500

The ship's total carrying capacity, including cargo, fuel, water, and stores, is its __________.

What is deadweight?

500

The engine's governor is designed so that engine speed decreases slightly as the load increases.

What is governor droop?

500

This advanced electronic system combines information from GPS, radar, charts, and other sensors to monitor the vessel’s position and movement.

What is an electronic chart display and information system? (ECDIS)

500
  • I am used in ship hydrodynamics.
  • I describe the difference between the ship's speed and the speed of the water flowing toward the propeller.
  • Naval architects use me when studying the performance of the ship's propeller.

What is a wake coefficient?

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