Nav standards Flashcards
What is the purpose of the Cutter Safe to Sail instruction?
Establishes minimum criteria for each cutter class to be used by OPCON, CO/OIC’s and mission support elements in risk management and operational readiness decisions.
Nav standards- How many days do you have to promulgate your Command navigation Standards?
90 days
electronic chart is considered currently corrected if it has been corrected within SINS I package?
SINS II package?
A. last six months
B. 30 days within last approved update, but does not exceed 120 days.
What is the Approved Electronic Chart hierarchy based on data accuracy?
- Official ENC/USACE IENC
- NGA DNC
- Official RNC
- Commercial vector chart
- Commercial raster chart
What is set?
What is drift?
The direction your vessel is getting moved by external force away from intended track.
The speed at which your vessel is moving away from its intended track.
what is your definition of Seaman’s eye for Boats? For Cutters?
- (Boats) Seaman’s eye is extensive knowledge of the local area to include aids to navigation, terrestrial landmarks, and depth contours.
- cutters, seaman’s eye can correlate what is being displayed on Enav systems with what is being observed visually.
Promulgate Command Navigation Standards within ? of assuming command. Prior Navigation Standards remain in effect until superseded.
90 days
what are the three modes of navigation?
Automated plotting = Installed Electronic Navigation (primary means of nav) Automatic positioning input.
Manual plotting= Paper used if ENAV fails Manual input
(Boats) Seaman’s Eye= Navigation based on extensive knowledge of local ATON, terrestrial landmarks, and depth contours.
What’s the process of fixing a vessels position?
use fix or terrestrial landmarks to generate lines of position and radar ranges.
Then enter them into ENS or plot on a paper chart to determine
electronic fix needs how many radar ranges?
visual fix needs how many common intersections?
three or more radar ranges or combination of visual or electronic.
visual is three of more LOP’s at a common point.
CG Enav has 3 depth alarm hierarchy?
Danger= flash red- continuous audible alarm and flashes red. warning= flashing yellow - brief audible alarm and flashes yellow. caution= flashing yellow - flashes yellow. Caution alarms are normally advisory
There are two general types of charts?
Vector and Raster
What does the CG use for charts?
- Vector charts- are points, line and data that represent real world objects.
- Raster are scanned image of a chart.
Corrected charts for cutters and boats?
45 days for cutter
6 months or for boats/ you don’t have to keep updating the chart card as long as the master chart is updated on each boat.
For units approved for paperless navigation, the following
boat navigation kit items will be required:
1) Penlight with red lens (QTY: 1EA).
2) Stopwatch with second hand or digital (QTY: 1EA).
3) Course and Leg Identifier for SAR (QTY: 1EA).
4) Marker (QTY: 1EA).
5) Notepad (QTY: 1EA).
6) #2 Pencil (QTY: as needed).
7) Pencil sharpener (QTY: 1EA).
When determining set and drift:
If fix is three min + ?
If less than three min?
no fix then its .
- determine set and drift at every fix.
- determine set and drift at every other fix
- an estimated position
What is a Dead reckoning position?when plotting a DR how many shall you plot?
Dr is a vessel or boats estimated position along a known track line.
at least two DRs
Who must approve tracklines and principal navigation routes. On all charts used for navigation, crews must verify information is identical on each chart to ensure navigation decision-makers have the same navigational information/picture
Co/OIC
when plotting paper charts outside of restricted water label with?
true
magnetic
distance of track leg
all track lines on electric charts when restricted water must display ?
True course
mag course
When correcting you use?
CDMVT
can dead men vote twice at (add) elections
add easterly and subtract westerly
When un-correcting use?
TVMDC
true virtue makes dull company after(add) wedding
subtract easterly add westerly
If NTMs/LNMs have been issued past the manufacturer’s electronic chart base date, then who can approve?
CO/OICs can authorize use of SINS as a primary means of navigation if a currently corrected and prepared paper chart is immediately available (out and ready)
Fixes- OIC Nav standards state when using three LOP’s are not simultaneously available you should advance?
- previous LOP’s to a common time to create a running fix.
- Do not erase a fix, take another fix.
When three LOPs are not simultaneously available, what do you do?
advance previous LOPs to a common time to create a running fix.
Set and Drift. eNav systems have two ways to calculate set and drift?
Computed and Ordered
SINS does not provide accurately update the electronic chart display manually. If NTMs/LNMs have been issued past the manufacturer’s electronic chart base date, then who can approve the usage of primary means of NAV?
CO/OICs can authorize use of SINS as a primary means of navigation if a currently corrected and prepared paper chart is immediately available (out and ready)
Cutter logs and records shall be maintained Ex: Getting U/w, entering port/restricted waters for how long?
from 90 days to 30 days
What are some specifics you are going to input in your Navigation brief?
Navigational Draft.
b. Length overall.
c. Vessel Beam.
d. Line handling commands.
e. Standard Helm commands.
f. Masthead height (fixed and unfixed.
Command Navigation Standards must define applicable navigational zones/areas, associated with cutters?
Cutters:
(1) Shoal Water.
(2) Rest Waters
(3) Coastal waters
(4) Open Ocean.
(5) Piloting waters
Command Navigation Standards must define applicable navigational zones/areas,
(Cutter boats.)
Boats:
(1) Shoal Water.
(2) Rest Waters
(3) Coastal Waters.
(4) Open Ocean.
(5) Principle Nav Routes, including special training areas
(6) AOR Key Waypoints.
(7) While in sight- Due care to monitor Nav zones and proximity to navigational hazards.
Each course leg must have?
Magnetic, True and distance
What is ARPA
automatic radar plotting aid, its used to acquire contacts on your radar.
What is the swing circle?
radius equal to length of the vessel added to the length of anchor chain released.
The Drag Circle,
radius equal to the distance from the hawse-pipe to radar antenna, or GPS antenna, added to the length of the anchor line released.
What is an electronic, visual, and estimated fix look like?
Radar- triangle
Visual- circle
both- square
What is your responsibilities as the OIC?
Cutters/ Boats
1. Change nav standards within 90 days.
2. Ensure provisions of this manual.
3. Ensure local operating doctrines match all TTP’s, and CG TTP to the maximum extent feasible.
4. Assign, certify and train Navigation personal.
5. Designate a navigator, UW ood or Chief. Shore units don’t need a Nav Petty officer.
6. Ensure Nav team is trained. Ensure boat crews are Nav trained.
BOATS (only)
7. Proficiency in precision anchoring
8. Proficiency in precision celestial NAV
9. Make sure a secondary CIC is available
10. Incorporate Risk Management
For units underway and not able to receive charts in a timely manner, paper charts are considered currently corrected if ?
the chart is corrected up to the latest LNM and NTM. The unit should obtain the most current edition as soon as possible.
Who updates Coast Pilots?
NOAA updates Coast Pilots weekly and posts the updates along with a complete edition containing all applicable corrections.
What does check the line mean?
Hold heavy tension on the specified line but render it as necessary to prevent parting the line.
What does Surge the line mean?
Hold moderate tension on a line but render it enough to permit movement of the ship.
What is standard full rudder?
Full rudder is normally the amount required for reduced tactical diameter.
What is standard rudder?
amount required to turn the ship on its standard tactical diameter.
In restricted water, compare the primary positioning source
to a backup positioning source at least every third fix.
Fixes shall not exceed one hour on a cutter
30 min for small boats
when piloting in restricted waters
- fixes shall be at least every 15 minutes
- Open ocean shall be at least 30 min fixes
in order to find true bearing to an object you must?
- Add the relative bearing + the ships heading.
- bearing to object is 090
- ships heading 300
300+90 = 390 - 360 = 030
E-Nav systems has two ways to calculate set and drift?
Computed and Ordered