Navigation Flashcards
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About these flashcards:
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TYPES OF FIXES :
a) Electronic (triangle) GPS or INS triangulation
b) Visual (circle) Visual triangulation
c) Composite (triangle with a circle inside)
d) Estimated Position (EP) (Square) Speed
e) DR: Estimated (Half Moon with a half circle) Dead Reckon
HOW OFTEN DO WE TAKE A FIX ?
EVERYTHING DEPENDS IN HOW FAR WE ARE FROM SHOAL WATER/LAND
THIS IS HOW THE FIXES WILL BE DEPENDING ON HOW FAR WE ARE FROM SHOAL WATER
a) 0 -2 NM 0 - 3 Min Restricted
b) 2 - 10 NM 3 - 15 Min Piloting
c) 10 - 30 NM 15 - 30 Min Costal
d) 30+ NM 30 Min General
What is a line of position (LOP)
An imaginary line from the ship to the NAVAID that we are shooting
What is DR
Projected position based on your fix interval (3, 10, 15, 30 min)
6 rules of DR
1) Every hour on the hour
2) Every course change
3) Every speed change
4) Every running fix
5) Every LOP
6) Label each fix with: course, speed, and time
Golf:
guide ship
Romeo at the dip:
preparing to come alongside.
Romeo closed up:
commence approach.
Romeo hauled down:
first messenger in hand.
Bravo at the dip:
temporary stop refueling.
Bravo closed up:
commence fuel.
Bravo hauled down:
cease pumping.
Prep at the dip:
15 min before breakaway.
Prep hauled up:
5 min before break away.
Prep hauled down:
all lines clear.
Discuss the difference between emergency and standard breakaway?
Emergency break away you sound 5 short blast. Standard breakaway you will you use the prep flag to signal when you’re ready to break away (no sound signals required)
Bravo
refueling / ammo unload/offload
Kilo
Working aloft
Kilo1
Over the side
Kilo 3
Aloft and over the side
Lima
HERO condition
Code-Alpha
divers (why code and not just alpha? Because we use code before any signal for international waters. Sometimes we have a foreign ship navigating beside
3rd sub
CO is not on board
PREP
5 minutes prior sunrise, colors and during UNREPS
SOPA
Senior Officer Present afloat
Quebec
Boat Recall
Papa
Personnel Recall
Oscar
Man Overboard
Uniform
Anchoring
2nd Sub
A guest is embarked
WHAT IS VMS
Voyage Management System
VMS STATIONS (IN ORDER)
Nav1 (QM WATCH)
Conn One
Nav 3 (Chartroom)
Nav 2 (CIC)
Nav 4 (CO)
ENL
WHAT DOES ENL MEAN
Emergency Navigation Laptop (that receive manually inputs from the DAGR)
What does DAGR stand FOR
Defense advance GPS receiver
What is set and drift
SET: direction we are being pushed off course
DRIFT: speed at which we are being pushed
What are the type of calculate position?
Electronic: GPS or radar
Piloting: Visual Navaids (buildings, structures, towers)
Celestial: navigation by stars, moon, and sun
Shoal water:
everything that is below our safety depth (our safety depth is 36ft, so that means that 35ft of depth is shoal water)
Ship Draft:
From the water line to the keel is 32 ft.
Ship Safety Draft:
36ft. After adding a 4 feet clearance.
Ship Height:
150.9ft
Ship Safety Height
176ft. After adding a 25 feet clearance.
Special sea and anchor detail:
Any time we are in restricted waters. 2nm or less
Low visibility detail:
When visibility is reduced to 6,000 yards (3nm) or less by fog, heavy rain, or other phenomena.
Flight Quarters porpuses (4)
Man overboard, helo ops, deck landing quals (DLQs), search and rescue
Restricted Maneuvering:
A vessel which due to the nature of her work is restricted in her ability to maneuver
Modified Navigation Detail:
5 nautical miles from land of shoal water. The NAV or ANAV should be on bridge
True bearing:
bearing relative to the north compass bearing corrected for compass
Relative bearing:
a bearing taken on an object relative to the ships heading. Measured from 000 degrees- 360 degrees.
DIW:
a vessel dead in the water (not moving).
Head on:
2 power driven vessels are meeting on reciprocal or only reciprocal courses. You see both running lights.
Crossing:
when 2 vessels are able to see one of each others running lights and mast light. (on side of each other).
What table displays the distance to shoal water / fix time interval relationship
3A
ENL receives ___
Emergency Navigation Laptop: receives manual inputs from DAGR
One prolonged blast
Getting underway, and making way
One prolonged blast every 2 min
Restricted visibility
One short blast
Altering course to Stbd
Two short blasts
Altering course to Port
Two prolonged blasts
Underway but Not making way
3 prolonged blasts
Going astern or in reverse
5 shorts blasts
Danger, stay away
6 short blasts
Man overboard
Collision
When one vessel runs into another
Allision
A vessel collides into anything other than a vessel
Aground
when a vessel runs into a navigation hazard: shoal water
Overtaking
A vessel shall be deemed to be overtaking when coming up with another vessel from a direction more than 22.5 degrees abaft her beam, that is, in such a position with reference to the vessel she is overtaking.
Stand on
Where one or two vessels keep out the way (give way vessel) and the other vessel shall keep the same course and speed (stand on).
Give way
Every vessel, which is directed to keep out of the way of another vessel shall, so far as possible, take early and substantial action to keep well clear
Swing Circle
The amount of distance the ship is allowed to swing from her anchored position
Drag Circle
A circle which shows when the ship is dragging. This is the amount of chain released plus the distance from the hawse pipe to the centerline pelorus.
Ships Height:
150.9ft
Hawsepipe to centerline Pelorus
156ft
Underway Navigation lights:
port(red)/stbd(green) running lights, fwd masthead light, aft masthead light and stern light (white)
In-port, moored:
aircraft warning lights, anchor lights, security lights
Engaged in special operations:
Depending on the operator. Normally red white red.
Not under command:
2 red lights.
Man overboard:
red over red pulsating
Anchored:
same as in port.
Aground:
2 red lights and an all around white light
Constrained By Draft:
3 red lights
Vessel at anchor:
1 ball *
Vessel not under command :
2 balls ** (vertical)
Restricted in ability to maneuver:
ball diamond ball <> (vertical)
Vessel aground:
3 balls *** (vertical)
Constrained by draft:
1 cylinder
Cases where ball equal red and diamond equal white
At Anchor, Restricted maneuverability, Not under command
Cases where shapes don’t equal lights
Aground and Constrained by Draft
Binoculars: (BIG EYES)
used for visually detecting aicis to navigation especially small ones such as buoys, and in reading their identifying markings. MK 3 MOD 5
Stadimeter:
an instrument for measuring the distance of objects of known heights, between 50 and 200 ft, covering ranges from 200 to 10,000 yards. Used for UNREPS.
Sextant:
used to make a measurement of the angle between lines from the observer to a celestial body and to the horizon.
12 inch Incandescent Searchlight:
Used for morse code of to indicate MOB location at night.
Bearing circle:
used for finding the direction of terrestrial objects.
Telescopic alidade:
similar to a bearing circle except that the alidade circle mounts a telescope instead of the sighting vanes. MK2 MOD 6
Magnetic Compass:
DFGMC (Digital Flux Gate Magnetic Compass)
Fathometer:
Measures our ships depth. We have 2 repeaters. 1 in the chart room and 1 in the pilothouse by the QMOW station.
Laser Range Finder.
Special binoculars that display the Range of an object.
Telltale panel:
Display normal running lights
Deviation:
Difference between magnetic and the evrocompass,tranadnagilia..
m.).
Variation:
The difference between true north and magnetic north a
Officer of the Deck (OOD):
Represents the CO. Overall in charge of the bridge.
Junior officer of the Deck (JOOD):
Assists OOD; works the OOD out of his job. In charge of administration tasking and internal comms.
Conning Officer (CONN):
Safely maneuvers the ship by giving orders to the helm and lee
helm.
Boatswain’s Mate of the Watch (BMOW):
Assist the OOD. Passes the word jaw the POD
Helmsman:
In charge of steering the ship ( course changes)
Lee Helmsman:
In charge of the throttles ( speed changes)
Quartermaster of the Watch (QMOW):
Represent the NAV, assists the OOD in overall navigation of the ship, and visual communications flags/morse code )
Lookout Net:
52
Navigation Net:
22
Radars:
primary: 67
ECDIS-N
Electronic Chart Display Information System - Navy
As one of the oldest Navy ratings, quartermasters have served aboard naval vessels since
1798, providing critical navigation skills, maintaining charts and oceanographic publications, and performing bridge watch duties ever since.
The colloquial form of address for a quartermaster is
“Wheels”
Were responsible for visual communications, and many of the personnel and their responsibilities were incorporated in the QM rating.
After 2004, the U.S. Navy disestablished the signalman rating (SM); signalmen.
The term appears to derive from the title of a German royal official, the ___ This term meant “master of quarters”
Alternatively, it could have been derived from ___ where the helmsman and captain controlled the ship.
The term appears to derive from the title of a German royal official, the “Quartiermeister.” This term meant “master of quarters”
Alternatively, it could have been derived from “master of the quarterdeck” where the helmsman and captain controlled the ship.
