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What is latitude?
Lines running north to south from the equators
What is longitude?
Lines running east to west from Greenwich meridian
Define true bearing
True north that an object is from the ship
What's does GPS stand for?
Global Positioning System
Where is Nimitz pivot point?
Between the island and the forward JBDs
What is a stadimeter?
Used to compute distance to an object if objects height is known
What is a sextant?
Used to measure angles between 2 objects
What is a Fathometer? Where is it located?
- Used to compute the distance from the bottom of the keel to the ocean floor
- Located in the chart room 09 lvl
What is dead reckoning?
Means of estimating your future position based on current course and speeds without regards to set and drift
What are the 6 bridge watch standers and their responsibilities?
- OOD - safety of the ship and crew
- Conning officer - assistant to OOD, orders course and speed
- BMOW - assistant to the OOD, carries out the ships plan of the day
- QMOW - representative of the navigator underway, assistant to the OOD and responsible for safe navigation
- Helmsman - steers the ship
- Lee helmsman - controls speed of the ship
What 3 ways can signalman communicate by visually?
- Flag hoist
- Flashing lights
Who wears a yellow hat in the pilot house?
What does VMS stand for?
Voyage management system
What does LOP stand for and what is it?
- Line of position
- Bearing or range to an object
What is set?
Direction the ship is being pushed by an outside force
What is DIW?
Dead in water
What is a chronometer? Where is it located?
- Navigational time piece
- 3 of them are located in the chart room 09 lvl
What is drift?
Amount of force measured in knots at which the ship is being set
What does ECDIS stand for?
Electronic chart display and information system
What is advance an transfer?
- Advance - the distance gained in the ships original direction after the rudder is put over
- Transfer - the distance gained at right angles after the udder is put over
What is the pivot point?
The point on the ship at which it turns
What is a fix?
3 or more LOPs which pinpoint a ships position
What is relative bearing?
LOP to an object in relation to the ship (bow = 0 degree mark)
What are two ways to attain a ships position? Which is primary?
- Visually - primary
Define head on
2 ships heading towards each other bow to bow
When one vessel crosses the bow of another at a perpendicular angle
Coming up on another vessel from a direction more than 22.5 degrees abaft her beam
Define stand on
Stand on vessel will maintain their course and speed
Define give way
The give way vessel will alter their course and speed
What is a telescopic alidade?
Navigational tool used by bearing takers to give visual LOPs to an object
What is a PMP?
- Parallel motion protractor
- A navigational drafting tool used to draw courses and LOPs
What is the gyrocompass?
A compass that gives true north heading
What is GMT?
Greenwich mean time (Zulu +/- 0)