Navigation Flashcards
What do u check before entering restricted waters?
Steering and propulsion
CO’s shall promulgate Command Nav standards within __ days of taking command
90 days
On a cutter, who approves all tracklines & routes?
CO
How often do you compare the primary positioning source to an unrelated positiong source?
Every 3rd fix in Restricted Waters, all other waters once a day
How do you know a trackline has been approved?
Name in ALL CAPS
When can you use a Category II positioning source as a primary source?
Open ocean only
How often do you compare GPS to celestial observation in open ocean?
Once a day
Selective Availability (SA) should be set to __
Zero
A paper fix is __ LOP’s from __ points of land/celestial objects with a seperation of at least__ degrees
3 LOP’s from 3 points of land/celestial, 15 degrees apart
When using relative bearings, min of __ LOP’s and __ radar range
2 visual LOP’s & 1 radar range
If fix interval is 3 mins or greater, determine set & drift when?
At every fix
If set & drift is > 3 mins, determine set & drift when?
Every second fix
a DR will be projected for at least __ fix intervals
2
Plot a DR every ___ in open ocean
Hour
When navigating with paper charts, fixed shall be taken no more than __ mins
30 mins
When navigating in Restricted waters, fixes shall be taken every ___ mins
15 mins
Are boats with SINS/ECS required to place fixes on paper charts?
No. unless in command nav standards
CG has ___ general classifications of systems that are authorized for use as primary means of nav
3- ECINS, ECS, SINS
Manually entering visual and radar LOP’s is Mode __ navigation in ECINS
Mode II
Using ECINS in restricted waters, compare primary posn source to backup every ___ fix
Third
To use ECS in open ocean as primary means of nav, must be able to transfer plot within ___ fix interval
One fix
An electronic chart is considered up to date if it has been updated in the last ___ days
45 days
How often does NOAA update ENC & RNC charts?
Weekly
For SINS, an electronic chart is considered up to date if it has been updated in the last ___ months
6 months
What is the only RNC (raster nav chart) that uses US Chart 1 symbology?
NOAA’s RNC
All tracklines on paper charts used outside of restricted waters shall contain what?
True AND Magnetic course
Who needs to review and sign the Nav Brief?
Navigator & CO
What is a fluxgate?
Self-calibrating electro-magnetic compass
It is recommended the OOD verbally receive a compass check every ____ and on every course change
Half hour
What cutters are not required to post a deviation table?
With an approved fluxgate compass
Electronic nav records shall be printed or saved & maintained for __ yrs
3 yrs
Soundings shall be recorded in ?
Ft, fathoms or meters
Getting u/w & entering port/approaching restricted waters Checklists shall be maintained locally for __ days
90
In US inland waters, official Inland ENC (I-ENC) data is produced by?
Army Corps of Engineers
Mode III navigation is what?
Using paper charts with vis/rad LOP’s to verify
A visual fix is a ?
Circle
An Electronic fix is a ?
Triangle
A DR is a ?
Half circle with a dot
An Estimated position is a ?
Square
Who is the Shipping Officer?
Person who evaluates the surface picture (designate contacts, etc)
If rudder commands are not specified, they should be carried out in __ * increments
10*
