AIDS TO NAVIGATION / SEAMANSHIP Flashcards
What is an assigned position? (AP)
With the exception of most buoys on the US, western rivers. Assigned Position is the specific geographical location, known as “AP”. these positions are expressed in LAT/LONG to the thousandths of a second. (Less than 1.2 inches.)
What is a design position? (DP)
The specific geographic location of a range structure prior to construction is known as design position (DP)
What is an As Built Position? (ABP)
Ranges shall be surveyed after construction is completed, and the recorded survey position is known as As Built Position (ABP)
What color is a Coast Guard Mooring buoy?
White with a blue band
The buoy hull shall hold three psi for _____ minutes.
10
The __________ anchor is a cast iron, pyramid shaped sinker designed for use in areas with mud or sand bottoms.
DOR-MOR
There are ____ basic classes of rhythms, used by the Coast Guard on light signals.
Eight
____________- displaying a single flash at regular intervals, the duration of the light, being less than the duration of darkness.
- ATON light characteristics*
Flashing
_____________ - displaying, not less than 60 flashes per minute.
ATON light characteristics
Quick flashing
____________- displaying groups of two or more flashes per minute, the groups being separated by a longer interval of darkness.
- ATON light characteristics*
Group flashing
________ - a group rhythm, with flashes of different duration show asked to produce a Morse characteristic.
- ATON light characteristics*
Morse
__________- displaying different colored flashes of light.
ATON light characteristics
Alternating
_________ - displaying equal intervals of light and darkness.
ATON Light characteristics
Isophase
____________ - displaying a single flash at regular intervals, the duration of light being greater than the duration of darkness.
ATON light characteristics
Occulting
__________- The light signal is fixed on, with no periods of darkness.
ATON light characteristics
Fixed
How many years is the minimum on-station period of all steel buoys except where earlier relief is dictated by unusual circumstances?
Six years
For lighted aids on fixed structures, routine servicing in a rush to not exceed how many years?
Three years
For unlighted aids on fixed structures, routine, servicing intervals, shall not exceed how many years?
Five years
For buoys, routine servicing, not exceed how many years?
Three years
Prior to getting underway or entering _______________, cutters shall conduct a steering test and propulsion check.
Restricted waters
A structure consisting of a number of piles driven into the seabed or river bed in a circular pattern and drawn together with wire rope. May be used as part of a dock structure or a minor aid to navigation. Commonly used when a single pile would not provide the desired strength.
Dolphin
A boat inspection report CG-________ records the results of a detailed engineering inspection.
CG-3022
The CG-3022 Boat Inspection Report is submitted for all boats less than ___ft and all ________.
all boats less than 65ft and all barges
A Cutter Engineering Report, Form CG-_______, shall be completed by all cutters 65ft in length and greater.
CG-4874