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BMC Study > Navigation > Flashcards

Navigation Flashcards

0
Q

What do u check before entering restricted waters?

A

Steering and propulsion

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1
Q

CO’s shall promulgate Command Nav standards within __ days of taking command

A

90 days

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2
Q

On a cutter, who approves all tracklines & routes?

A

CO

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3
Q

How often do you compare the primary positioning source to an unrelated positiong source?

A

Every 3rd fix in Restricted Waters, all other waters once a day

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4
Q

How do you know a trackline has been approved?

A

Name in ALL CAPS

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5
Q

When can you use a Category II positioning source as a primary source?

A

Open ocean only

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6
Q

How often do you compare GPS to celestial observation in open ocean?

A

Once a day

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7
Q

Selective Availability (SA) should be set to __

A

Zero

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8
Q

A paper fix is __ LOP’s from __ points of land/celestial objects with a seperation of at least__ degrees

A

3 LOP’s from 3 points of land/celestial, 15 degrees apart

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9
Q

When using relative bearings, min of __ LOP’s and __ radar range

A

2 visual LOP’s & 1 radar range

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10
Q

If fix interval is 3 mins or greater, determine set & drift when?

A

At every fix

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11
Q

If set & drift is > 3 mins, determine set & drift when?

A

Every second fix

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12
Q

a DR will be projected for at least __ fix intervals

A

2

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13
Q

Plot a DR every ___ in open ocean

A

Hour

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14
Q

When navigating with paper charts, fixed shall be taken no more than __ mins

A

30 mins

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15
Q

When navigating in Restricted waters, fixes shall be taken every ___ mins

A

15 mins

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16
Q

Are boats with SINS/ECS required to place fixes on paper charts?

A

No. unless in command nav standards

17
Q

CG has ___ general classifications of systems that are authorized for use as primary means of nav

A

3- ECINS, ECS, SINS

18
Q

Manually entering visual and radar LOP’s is Mode __ navigation in ECINS

A

Mode II

19
Q

Using ECINS in restricted waters, compare primary posn source to backup every ___ fix

A

Third

20
Q

To use ECS in open ocean as primary means of nav, must be able to transfer plot within ___ fix interval

A

One fix

21
Q

An electronic chart is considered up to date if it has been updated in the last ___ days

A

45 days

22
Q

How often does NOAA update ENC & RNC charts?

A

Weekly

23
Q

For SINS, an electronic chart is considered up to date if it has been updated in the last ___ months

A

6 months

24
Q

What is the only RNC (raster nav chart) that uses US Chart 1 symbology?

A

NOAA’s RNC

25
Q

All tracklines on paper charts used outside of restricted waters shall contain what?

A

True AND Magnetic course

26
Q

Who needs to review and sign the Nav Brief?

A

Navigator & CO

27
Q

What is a fluxgate?

A

Self-calibrating electro-magnetic compass

28
Q

It is recommended the OOD verbally receive a compass check every ____ and on every course change

A

Half hour

29
Q

What cutters are not required to post a deviation table?

A

With an approved fluxgate compass

30
Q

Electronic nav records shall be printed or saved & maintained for __ yrs

A

3 yrs

31
Q

Soundings shall be recorded in ?

A

Ft, fathoms or meters

32
Q

Getting u/w & entering port/approaching restricted waters Checklists shall be maintained locally for __ days

A

90

33
Q

In US inland waters, official Inland ENC (I-ENC) data is produced by?

A

Army Corps of Engineers

34
Q

Mode III navigation is what?

A

Using paper charts with vis/rad LOP’s to verify

35
Q

A visual fix is a ?

A

Circle

36
Q

An Electronic fix is a ?

A

Triangle

37
Q

A DR is a ?

A

Half circle with a dot

38
Q

An Estimated position is a ?

A

Square

39
Q

Who is the Shipping Officer?

A

Person who evaluates the surface picture (designate contacts, etc)

40
Q

If rudder commands are not specified, they should be carried out in __ * increments

A

10*

BMC Study (11 decks)

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