Navigation Flashcards
Who is in charge of the ship and is responsible to the commanding officer for the safe and proper operation of the ship or station?
Officer of the Deck (OOD)
Who orders the courses the helmsman steers?
Conning Officer
Who is an enlisted assistant to the OOD during underway watches and must see that all deck watch stations are manned with qualified personnel and all watch standers in previous watch sections are relieved?
Boatswains Mate of the Watch (BMOW)
Who is a qualified steersman who steers courses prescribed by the conning officer?
Helmsman/Lee Helmsman
Who is a person detailed to observe everything within an assigned sector and to report everything seen in or heard from the sector to the OOD and the combat information center (CIC) watch officer?
Lookouts
The normal peacetime lookout organization has how many people in each watch section?
3
Who is an enlisted assistant to the OOD while underway, assists the OOD in navigational matters and maintains the ships deck log?
Quartermaster of the Watch (QMOW)
What is the distance north or south of the equator, expressed in degrees and minutes?
Latitude
What is the distance east or west of the prime meridian, which runs through Greenwich, England?
Longitude
What is the direction of the current called?
Set
The velocity of the current is called speed of current and is sometimes referred to as what?
Drift
What is the basis or origin of longitude measurement, it is mean solar time measured w/ reference to the 0 degrees median of longitude located at Greenwhich, England?
GMT/Coordinated Universal Standard Time
An area in all parts of which the same time kept
Time Zone
The angle between the magnetic and geographic meridians at any place, expressed in degrees and minutes east or west to indicate the direction of magnetic north from true north
Variation
The angle between the magnetic meridian and and the axis of a compass card, expressed in degrees east and west to indicate direction in which the northern end of the compass card is offset from magnetic north
Deviation
A uniform system of maritime buoyage, organized by the International Association of Lighthouse Authorities, which is now implemented by most maritime nations
IALA (A/B) Bouyage System
A system of aids to navigation in which the shape, color, and number distinction are assigned in accordance w/ location relative to the nearest hazard to navigation
Cardinal System
Defined as the practice of observing celestial bodies (the Sun, Moon, Stars and Planets) to determine the ships position
Celestial Navigation
Defined as the determination of position by the use of radio waves
Radio Navigation
Defined as projecting an intended course and speed from a known point
Dead Reckoning (DR)
Defined as the movement of a vessel with continuous reference to landmarks, aids to navigation, depth sounding and radio navigation
Piloting
Two or more objects in line
Range
These aids are used to mark fairways, mid channels and offshore approach points
Channel Markings
The amount of distance run on the original course until the ship steadies on the new course
Transfer
What is a point on the centerline about which the ship turns when the rudder is put over; it also scribes the ships turning circle?
Pivot Point
The rate at which a ship increases and decreases speed
Acceleration/Deceleration
What is the path followed by the ships pivot point when making a 360 degree turn?
Turning Circle
What is a bearing relative to true north; compass bearing corrected for compass error?
True Bearing
This pertains to bearing relative to heading of a vessel, expressed as the angular difference between the heading and the direction, usually measured from 0 degrees at the heading clockwise through 360 degrees
Relative bearing
This term denotes that another vessel is not underway
Dead In the Water (DIW)
When two ships meet **, or nearly so each ship must change course to starboard and pass port to port
Head on
When two power driven vessels are ** and involve risk of collision the vessel having the other to starboard must keep out of the way and will avoid usually by turning to starboard and passing astern of the other ahead of the other vessel
Crossing
A vessel that is approaching another vessel from any direction more than 22.5 degrees abaft it’s beam
Overtaking
A vessel that keeps out of the way of the other vessel
Give way
A vessel that stays on course and speed
Stand on
An instance of one moving object or person striking violently against another
Collision
The action of dashing against or striking upon
Allision
Resting or lodged on the bottom
Aground
Also known as BIG EYES, have a magnification of 20-power with an apparent field of view of approximately 70 degrees
Ships Binoculars
An instrument for determining the distance to an object of known height by measuring the vertical angle subtended by the object
Standimeter
It’s only function is to measure angles, either horizontally or vertically
Sextant
A ring designed to fit snugly over a compass repeater; and provided with vanes for observing compass bearings
Bearing Circle
A similar ring provided with means for observing azimuths of the sun is call a what?
Azimuth Circle
What is used to obtain bearings of aids to navigation to determine the ships position?
Telescopic Alidade
An instrument consisting of a protractor and one or more arms attached to a ** so that the movement of the arms is everywhere parallel
Parallel Motion Protractor (PMP)
An instrument for transferring a line parallel to itself
Parallel Rulers
A map or geospatial database intended primarily for navigation of aircraft or vessels
Charts
A compass having one or more gyroscopes as the directive element and tending to indicate true north
Gyrocompass
A compass depending for its directive force upon the attraction of the horizontal component of the earths magnetic field for a magnetized needle or sensing element free to turn in a horizontal direction
Magnetic Compass
A radio system which measures distance and usually direction by a comparison of reference signals w/ the radio signals reflected or retransmitted from the target whose position it to be determined
Radio Detection and Ranging (RADAR)
What is used for obtaining soundings in shallow depths?
Fathometer
This is a system of highly accurate, passive, all weather, worldwide navigational system suitable for subsurface and surface navigation, as well as for use in aircraft
Satellite Navigation (SATNAV))
This was developed to provide highly precise position and time information anywhere in the world, regardless of weather condition
Global Positioning System
Now fully operational, GPS consists of how many satellites?
21 satellites plus 3 operational spares
Used for measuring the distance to an object
Laser Range Finder
This means a green light on the starboard side and a red light on the port side
Sidelights
This means a white light placed as nearly as practicable at the stern
Sternlight
This means a white light placed over the fore and aft centerline of the vessel
Masthead light
A pair of red lights blinking off and on (pulsate), indicates that a ship has what?
Man overboard
Two red lights, visible 2 miles all around the horizon, pulsate 50 to 60 times a minute by means of crank on the light panel in the pilot house
Not under command
Refueling/ammunition handling
Bravo
Senior Officer Present Afloat (SOPA)
Starboard
Personnel Recall
Papa
Boat Recall
Quebec
Drivers are down
Alpha
Man overboard
Oscar
Anchoring
Uniform
Absence of a flag officer or unit commander whose personal flag or command pennant is flying on this ship
1st Sub
Absence of Chief of Staff or Chief of Staff Officer of the commander whose personal flag is flying on this ship
2nd sub
Absence of captain (it’s use immediately shifts to the executive officer when the captain departs for a period of absence of 72 hours or more)
3rd sub
Absence of civil or military official whose flag is flying on this ship
4th sub
What is the only pennant that maybe flown above the national ensign?
Church or Jewish pennant
An instrument for measuring atmospheric pressure
Barometer
This is a type of hygrometer (an instrument for determining atmospheric humidity) consisting of dry bulb and wet bulb thermometers
Psychrometer
It controls the switches for the port and starboard running lights, towing lights, masthead light, second masthead light, and stern light
Telltale panel
What is the day shape for one black ball
Vessel at anchor
What is the day shape for two black balls
Vessel not under command
What is the day shape for three black balls
Vessel aground
What is the day shape for one black ball, one diamond, one black ball
Restricted in ability to maneuver
What is the day sheet for one rectangle
Constrained by draft
What is the day shape for one diamond
Towing
What is the day shape for two black balls
Vessel not under command
Medical attention required
Whiskey
