Nav Standars Flashcards
3 minute rule?
Speed x 100 = distance traveled in Yards
6 Minute Rule
Speed / 10 = Distance traveled in NM
ICW Marks?
Yellow triangle - STBD hand aid
Yellow square - Port hand aid
ICW length
Manasquan, NJ to Brownsville, TX
Special Mark color?
Yellow
Safe water mark color/design
Vertical red and white stripes
Danger mark color/design
Black and red horizontal stripes
What type of marks does US waters use
Lateral. Port/STBD side of a channel
What IALA system used in US waters? What does IALA stand for?
Bravo
International association of lighthouse authorities
What are the different modes of navigation? What are the Nav Modes definition and position source?
Automated. Installed enav with auto position input
Manual. Installed enav with manual input OR, traditional paper charts due to enav failure.
Navigator requirements for cutters and ashore units?
Cutter. Designated by OIC, experiences OOD with maturity, judgment, training, and navigator proficiency
Ashore. Designate navigation pretty officer. Experienced coxswain with enav, charts, and manual plotting proficiency.
OIC nav standard command responsibilities
- Ensure compliance with provisions of CG nav standards.
- Promulgate unit nav standards in 90 days
- Assign, train, and certify navigation personnel
- Incorporate principles of effective risk management
Additional OIC command responsibilities for cutters?
- Ensure primary nav team is trained and proficient
- Maintain crew proficiency in anchoring
- Fully understand all modes of operation for the cutter
Additional OIC responsibilities for boats?
- Ensure boat crews are trained to provide nav support to the crew.
- Develop coxswains ability to nav by seaman’s eye through extensive AOR familiarization
What are the 2 types of electronic charts? Hierarchy?
Vector (ENC, DNC,…)
Raster (digital image)
- Official ENC / IENC
- NGA DNC
- Official RNC
- Commercial Vector
- Commercial Raster
What is an electronic fix? Visual fix? Running fix?
Electronic. 1) electronic lat/long, 2) 3 or more radar ranges, or combination of radar and visual LOPs
Visual. Simultaneous intersect of three or more LOPs
Running. Used for limited LOPs. Advances/retires previous LOP based on consistent course
What is set and drift
Effect of wind, tide, and currents on ships movement through the water.
Set. Direction (true/magnetic)
Drift. Effect on speed
Six rules of a DR
- Every hour on the hour
- Every course change
- Every speed change
- After each fix or running fix
- When obtaining a single LOP
- New course line from each fix or running fix
Enav alarm hierarchy and characteristics?
- Danger. Flashes red with continuous audible alarm
- Warning. Flashes yellow with brief audible alarm
- Caution. Flashes yellow
Cutter paper chart requirements
If utilized... 1. Designate list of ready charts 2. Pen shoal water 3. Label OIC approved tracklines with; True and mag course, leg distance, leg speed, visual/radar points, danger and turn bearings/ranges, slide lines, chart shifts
Cutter nav standards shall cover what navigational information
Nav draft, safety contour, shallow contour, safety depth, LOA, beam, masthead height, tactical data, full load draft, height of bridge above waterline, location if GPS antenna, distance from hawsepipe to alidade, distance from hawsepipe to GPS, distance from hawsepipe to stern, distance from radar to hawsepipe, distance from GPS to stern, distance from radar to stern, line commands, helm commands, engine order commands
Cutter additional nav standards requirements
- Defined nav zones
- Appropriate fix interval
- Route planning
- Unique operations
- Speed management
- Cell phone use
- Chart and pub preps
On cutters. What makes an electronic or paper chart current
Electronic. Updated within last 45 days
Paper. Most current edition and corrected up to the last LNM/NTM
Cutter boat nav standard requirements
- Boat characteristics
- Crew manning requirements and personnel limitations
- Environmental limitations and operating parameters
- Other; speed reqs, speed management, pursuit….
