š Key Concepts
ā¢ International Code of Signals (INTERCO) procedures for transmitting courses and bearings
ā¢ Difference between true, magnetic, and compass courses
ā¢ Standard letter groups/preambles used in ICS for course-related messages
š Think About
ā¢ Ask yourself: when mariners exchange course information internationally, what is considered the default reference (true, magnetic, or compass) if nothing special is added?
ā¢ Which, if any, of the options describes a standardized ICS procedure (letters or suffixes) you recognize from signal books, rather than something that just "sounds reasonable"?
ā¢ Does the Code usually require extra letters for every course sent, or only when you are using something other than the normal reference?
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Before You Answer
ā¢ Verify what the default reference is for courses and bearings in the International Code of Signals when no suffix (T, M, or C) is used.
ā¢ Check whether the ICS actually uses the prefix "CSE" anywhere as a standard signal group for courses.
ā¢ Confirm from ICS whether adding T/M/C is mandatory, optional, or only used when the reference is not the usual one.