Term
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Definition
MF= 0.3 to 3MHz
HF= 3 to 30MHz
VHF= 30 to 300 MHz
UHF= 300 to 3000 MHz |
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Term
| Commonly used VHF-FM channels |
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Definition
6=Safety and SAR
12= Port Operations
13= Bridge to Bridge
16=International Distress Channel
21A= Intra-CG working frequency
22A=Primary between CG and civilian stations
23A=Intra-CG working freq. between units
81A=Intra-CG working-freq.
83A=Intra-CG working freq. |
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Term
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Definition
1) Red Star Shells, 2)Cont. Fog Horn, 3)Flames on a Vessel, 4) Gun fired at 1min. Intervals, 5) Mayday by Radio, 6) S.O.S., 7) Orange background with Black ball and square, 8) Parachute Flare, 9) Dye Marker (any),
10) November over Charlie Flags, 11) Sqaure flag and Ball, 12) Wave Arms, 13) Radio-Telegraph Alarm,
14) Radio-telephone Alarm, 15) EPIRB, 16) Orange Smoke 17) High-intensity flashes 50-70/min. |
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Term
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Definition
Horizontal (Latitude makes the ladder)
Longtude= vertical |
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Term
Circle=
1 Degree=
1 Minute= |
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Definition
=360 Degrees
=60 Minutes
=60 Seconds |
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Term
True Compass
Magnetic Compass
True Direction |
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Definition
=uses the north pole as a referance point
=uses the true N. Pole as a referance point
=differs from magnetic by variation |
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Term
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Definition
| Compass error is the angular difference between a compass direction and its corresponding true direction. The magnetic compass reading must be corrected for variation and deviation. |
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Term
| Correcting (Compass Error) |
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Definition
Compass, Deviation, Magnetic, Variation, True, ADD, Easterly Error
Can Dead Men Vote Twice At Election |
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Term
| Uncorrecting (Compass Error) |
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Definition
True, Variation, Magnetic, Deviation, Compass, ADD Westerly Error
True Virtue Makes Dull Company After Weddings |
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Term
| Reporting an Object Underway |
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Definition
Object, Bearing, Range
(Fishing Vessel, Bearing North, 500 Yards) |
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Term
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Definition
| Light Lists provide more complete information concerning AtoN than can be shown on charts. Hawaii uses Volume VI of VII |
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Term
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Definition
| Tide Tables give daily predictions of the height of water, at almost any place, at any given time and are published in four volumes (Hawaii uses III) |
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Term
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Definition
| Coast Pilot includes all the additional information that cannot be shown on a traditional chart. Each Coast Pilot contains sailing directions between points in its respective area, including recommended courses and distances. Channels with all their controlling depths and all dangers and obstructions are fully described. Harbors and anchorages are listed with info on marine repairs and boat supplies as well. Info on canals, bridges, docks, and more is included. |
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Term
Computing Speed, Time, Distance
60 D ST |
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Definition
D= S x T/60
S= 60D/T
T= 60D/S |
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Term
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Definition
3=Yards (x100)
6 Kts in 3 min.=600 Yards
6=Miles (/10)
60 Kts. in 6 min. =6 Miles |
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Term
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Definition
| B, Brg.:The Horizontal direction of one terrestrial (earth bound) point from another (the direction in which an object lies from the vessel) is its bearing, expressed as the angular distance (degrees) from a reference direction (a direction used as a basis for comparison of other direction.) A bearing is usually measured clockwise from 000* through 359* at the reference direction- true north, manetic north or compass north |
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Term
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Definition
| C.: The intended horizontal direction of travel (the direction indended to go), expressed as angular distance from a reference direction clockwise from 000* through 360*. For marine navigation, the term applies to the direction to be steered. The heading of 360* is always referred to or spoken as 000*. |
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Term
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Definition
| Hdg.: The actual direction the boat's bow is pointing at any given time. |
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Term
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Definition
| Line drawn on a chart going in the direction of a course. |
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Term
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Definition
| Current Sailing is a method of allowing for current in determining the course made good, or of determining the effect of a current on the direction or motion of a boat. |
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Term
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Definition
| DR: Dead reckoning is the determination of approximate posistion by advancing a previous position for course and distance only, without regard to other factors, such as, wind, sea conditions and current. |
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Term
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Definition
| DR Plot is the plot of the movements of a boat as determined by dead reckoning. |
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Term
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Definition
| Position refers to actual geographic loaction of a boat. It may be expressed as coordinates of latitude and longitude or as the bearing and distance from an object whose position is known. |
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Term
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Definition
| A DR position is a position determined by plotting a single or a series of consecutive course lines using only the direction (course) and distance from the last fix, without consideration of current, wind, or other external forces on a boat. |
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Term
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Definition
| EP: A DR position modified by additional information, which in itself is insufficient to establish a fix. |
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Term
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Definition
| A fix is a position determined from terrestrial, electronic, or celestial data at a given time with a high degree of accuracy. |
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Term
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Definition
| LOP: a line of bearing to a known object, which a vessel is presumed to be located on at some point. |
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Term
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Definition
| Coast Piloting refers to directing the movements of a boat near a coast. |
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Term
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Definition
There are two types of ranges used in piloting:
1) Two or more fixed objects in line. Such objects are said to be in range.
2) Distance in a single direction or along a great circle. Distance ranges are measured by means of radar or visually with a sextant. |
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Term
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Definition
| R Fix: A position determined by crossing LOP's obtained at different times. |
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Term
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Definition
| NM: A nautical mile is used for measurement on most navigable waters. It is 6076 feet or approximately 2000 yards and is equal to 1 minute of latitude. |
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Term
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Definition
| Kn or kt: a knot is a unit of speed equal to one nautical mile per hour. |
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Term
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Definition
| TR: the course followed or intended to be followed by a boat. The direction may be designated in degrees true or magnetic. |
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Term
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Definition
| The direction toward which the current is flowing expressed in degrees true. |
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Term
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Definition
| The speed of the current usually stated in knots. |
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Term
| Course Over Ground/ Course Made Good |
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Definition
| COG/CMG: The resultant direction of movement from one point to another. |
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Term
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Definition
IALA-B
Red bouy to STBD (Red, right, returning)
Green bouy to PORT |
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