Navigator Activity Badge: water option
Alternative C - water
Have a good working knowledge of charts, chart
datum and symbols used.
Display an aptitude in compass work by
completing the following three activities:
Read a mariner's compass marked in points
and degrees and have knowledge of compasses generally.
about variation and avoiding deviation. Be able to correct a magnetic
compass course for variation and deviation to obtain a true bearing.
Given a true bearing, successfully adjust this to obtain a compass
Understand how compass error can be found
from a transit bearing.
- Read a mariner's compass marked in points and degrees and have knowledge of compasses generally.
Complete two of the following:
Understand how a position may be found
from two intersecting position lines.
Understand what is meant by a 'cocked hat'
position and how to use it safely. Plot a position from any three cross
Plot a position using the 'running fix'
Plot a position using a combination of
compass bearings and any one or more of the following:
satellite navigation system
vertical sextant angle
horizontal sextant angle
line of soundings
- satellite navigation system
- Understand how a position may be found from two intersecting position lines.
Be able to use tide tables and tidal stream
Understand the use of the marine log to obtain
distance run and speed.
Understand the buoyage system for United Kingdom
coastal waters and other methods of marking dangers and channels.
your awareness of the latest developments in electronic technology such
as the Global Positioning System and electronic charts.
a coastal voyage of between four and six hours acting as navigator. A
log should be kept showing courses steered, distance run, navigation
marks passed and weather experienced. During the voyage:
Plot the estimated position every hour by
keeping up the dead reckoning.
Whenever appropriate, and not less than
once per hour, plot an observed position by bearings or other means of
obtaining a fix.
- Plot the estimated position every hour by keeping up the dead reckoning.
The voyage should be planned on the chart beforehand using tidal
streams to the best advantage and giving hourly courses to steer for an