Navigation Flashcards
What is the barometer?
Used to determine air pressure outside
What does the stadimeter measure?
Distance of object
What are the heights and range that the stadimeter measure at?
Height 50 and 200 Feet
Ranges 200 to 10,000 yards
What does telescopic alidade do?
Takes real and true bearing to distant object
What does sextant measure?
Measures angles
What does chronometer do?
Gives mean solar time
What is dead reckoning?
Estimated position based on course and speed
What are the 6 rules of dead reckoning?
Every hour on the hour Every speed change Every course change Every fix Every new fix Every line of position
How does set and drift get its measurement?
By current direction and speed
What effects Set and Drift?
Wind and current
What is Set?
The direction toward which the forces tend to push vessel
What is drift?
Velocity of the force in knots
What is variation?
The difference between the value of true north and magnetic north
What buoy system does Japan use?
IALA B
What side are Red buoys? Port or STBD
STBD
What side is green buoys?
PORTSIDE
What does SCU stand for?
Steering control unit
What does the SCU consist of?
Helm
Lee Helm
manual ships whistle button
Manual ship whistle lever above
What is radio channel for bridge to bridge?
10,12 and 16
What does Tell Tale Panel control?
Underway lights
What color light is Masthead?
White
What color lights are on port side
Red
What color lights are STBD side?
Green
What are the Inport lights?
Aircraft warning(red) Flagstaff/jackstaff(white) Anchor(white) Deck Waterline security(white)
Light for man overboard?
2 red flashing lights
What color light for Not under command? (Loss of steering or propulsion)
2 red
What color light for restricted maneuver?
Red white Red
What color light is aground?
3 red
What day shape is man overboard?
Oscar
What day shape is restricted maneuver?
Ball, diamond, ball
What day shape is aground?
3 black balls
What day shape is not under command?
2 black balls vertically
What day shape is anchored
1 black ball
What day shape is constrained by draft?
1 cylinder
How many bells does the president of recognized country get?
8
How many bells do admirals get?
6
How many bells do captains and commanders get?
4
What is plane guard?
A ship stationed behind another ship conducting flight ops to pick up man overboard
what are the different ways to recover man overboard?
Helio
small boat
Shipboard (forecastle)
What is hardship aground?
Incapable getting underway on own
What is soft ship aground?
Able to get underway on own
What is Advance?
Distance gained in the direction of the original course when ship is turning
What is transfer?
The distance gained at right angles to the original course when the ship is turning.
What is pivot point?
Point of hull in which ship actually turns
What is turning circle?
Amount of distance ship travels when changing direction 180 degrees
What is true bearing?
In relation to North Pole
What is relative bearing?
Relation to an object based on bow of ship
What is DIW?
Ship comes to complete stop
What are the methods of obtaining ship position?
Electronic(triangle) Radar(triangle)
Visual(circle)
Composite, combination of any methods
Celestial
How do we drive the ship if we lose both gyros?
Where is it located?
Digital fluxgate magnetic compass
Above helm
How many sec is prolonged horn blast?
4-6 sec
How many sec is short blast horn ?
1 sec
What is drag circle radius?
Sum of the distance between the hawsepipe to pelorus stands and the scope Chain let out
What is drag circle?
A inner circle around the anchor to determine if ships anchor is holding
What is swing circle?
Outer circle around anchor that represents maximum arc the ship can swing while at anchor
How do you get swing circle radius?
Sum of the ships length plus the scope of chain let out
How you determine scope of chain?
By depth of water times by 5-7
What is the Psychrometer measure? Explain
Atmospheric Humidity
Gives relative humidity and dew point temperature
What is Code Alpha?
Divers
What is bravo flag?
Ammo handling/fuel transfer
What is November Charlie?
SOS
What is Delta flag?
Degaussing
What is foxtrot flag?
Fixed wing aircraft operations
What is Mike flag?
Medical ship
What is Oscar flag?
Man overboard
What is papa flag?
Personnel recall
What is Quebec flag?
Small boat Recall
What is Romeo flag
Preparing to come alongside (RAS)
What is Sierra flag?
Flag hoist drills
What is uniform flag?
Preparing to anchor
What is victor flag?
Streaming ops (MFTA)
What is golf flag?
Guide ship
What is hotel flag?
Helio ops
What is hotel 1?
Vert rep code
What is India flag?
Coming alongside Inport
What is kilo flag?
Man is aloft
What is Lima flag?
H.E.R.O.