NAVIGATION Flashcards
What is a sextant?
Used for celestial navigation
What is a stadimeter?
Gives distance of a object based on its height
What’s a telescopic alidade?
Gives bearing of a object
What’s a magnetic compass?
Based on magnetic north
What’s a psychrometer?
Gets relative humidity/dew point based on wet and dry bulb thermometer
What does barometer do?
Atmospheric pressure
What is set and drift?
Angle and speed ship is pushed off course
What is advance?
Distance gained forward from time you mark your turn til you’re on new course
What is transfer?
Distance gained left or right of track from time you mark your turn until you’re steady on new course
What’s true bearing?
Based on true north
What is relative bearing?
Based on relation to ship
What’re the underway navigation light?
Port
Starboard
FWD/ Mast Headlight
Stern Light
What color is Port light?
Red
What color is starboard light?
Green
What color is FWD/AFT Mast headlight?
White
What color is stern light?
White
What’s the telltale panel used for?
Normal underway lights. Has 2 filaments RED and AMBER. When 1 goes out it turns Amber but when both go out it turns Red and has a alarm
What’s the lights for MOB?
Flashing red. Flashes by cranking it manually
What lights are used for Restricted Ability to Maneuver?
Red
White
Red
What day shapes are used for Restricted Ability to Maneuver?
Ball
Diamond
Ball
What lights are for Not Under Command?
Red
Red
What day shapes are for Not Under Command?
Ball
Ball
What lights are for anchor?
All around white light
What’s the day shape for anchor?
1 Ball
What lights are for Constrained by Draft?
Red
Red
Red
What day shapes are used for Constrained by Draft?
1 Cylinder
What is swing?
Length of shots paid out plus length of ship
What is drag?
Length of shots paid out plus distance from hawsepipe to Polaris
What is latitude?
Measured north and south of equator
What is longitude?
Measured east and west from Prime Meridian
What is GMT?
Zulu time
What does GMT stand for?
Greenwich Mean Time
Where is GMT?
Greenwich, England
Prime Meriden
How many times zones are there?
25
What is variation?
Difference between true north and magnetic north
What’s the difference between IALA A and B?
A- red right leaving
B- red right returning
Where is IALA B used?
Americas and Philippines
Where is IALA A used?
Rest of the world
What are cardinal buoys?
Point direction to safe water
What does north look like?
2 triangles facing up
What does east look like?
2 triangles facing away from eachother
What does south look like?
2 triangles facing down
What does west look like?
2 triangles pointing towards eachother
What’re the different ways to get ship’s position?
Visual
Radar
Electronic
Celestial
What does OOD do?
Overall in charge of ship when CO isn’t in the bridge
What does CONN do?
Gives orders to helm
What does BMOW do?
Passes words and lookout rotation
What does QMOW do?
Represents Nav when he’s not on the bridge. Responsible for safe navigation
What does HELM do?
Steers ship
What does LEE HELM do?
Controls ship’s speed
What does VMS stand for?
Voyage Management System
How many VMS modes are there?
4
What are the 4 modes of VMS?
NAV1
NAV2
NAV3
CONN2
Where is NAV1?
Bridge
Where is NAV2?
Chart room
Where is NAV3?
Combat
Where is CONN2?
Bridge
What is CONN1?
BME
What’s BRAVO for?
Fuel and Ordinance
What is HOTEL for?
Helo operations
What’s CODE ALPHA for?
Divers
What’s INDIA for?
Alongside
What’s GOLF for?
Guide ship
What’s KILO for?
Personnel aloft or over the side
What’s LIMA for?
HERO
What’s OSCAR for?
Man overboard
What’s PAPA for?
Personnel Recall
What’s QUEBEC for?
Boat recall
What’s ROMEO for?
Replenishing or Transferring
What’s UNIFORM for?
Anchoring/Mooring
What’s PREP for?
Colors
What’s 1st Sub for?
Absence of official for 72hrs or less
Where is 1st Sub flown?
Outboard STBD yardarm
What is 2nd Sub for?
Absence of chief of staff
Where is 2nd Sub flown?
Inboard PRT yardarm
What is 3rd Sub flown for?
Absence of CO
Where is 3rd Sub flown?
Outboard PRT yardarm
What is 4th Sub for?
Absence of civilian official
Where is 4th Sub flown?
Inboard STBD yardarm