Chart-Work
Introduction
Latitude, Longitude
Tool Box
Dividers / Compass
Plotters
•
Portland
•
Breton
•
Parallel Ruler
•
Roller
•
Triangles
Compass
•
Ships
•
Handheld
Chart work is a skill requiring accuracy and precision.
The
safety
of
vessel
depends
upon
the
quality
and
reliability
of
chart
plotting.
Hence
navigators
doing
chart
plotting
should
do
it
with
utmost
care
and
attention.
A
wrong
course
line
or
position
fix
will
mislead
where
the
vessel
is
placed
and
is
likely
to
make
way
for
accidents.
The presentation will cover the following topics.
Marking
Plotting
•
Symbols
•
Cocked hat
Calculations
•
Distance
•
Speed
•
Time
•
Variation
•
Deviation
Tidal information
•
Diamond
•
Tables
•
Sextant