What is INTERCO or International Code of Signals and its contents in details ?

• Single letter signals allocated to significations which are very urgent, important ,or of very common use;
• Two letter signals for the general section;
• Three letter signals beginning with ‘m’ for the medical section.

3. COMPLIMENTS EXPRESS

• VARIATIONS IN THE MEANING OF THE BASIC SIGNAL.

Examples:

1. ‘CP’ =   ‘I Am ( Or Vessel Indicated Is ) Proceeding To  Your Assistance’.
2. ‘CP 1’    =  ‘Sar  Aircraft Is Coming To Your Assistance’.

• QUESTIONS CONCERNING THE SAME BASIC SUBJECT OR BASIC SIGNAL.

Examples:

1. ‘DY’ =  ‘Vessel ( Name Or Identity Signal ) Has Sunk In Lat….. Long…..’.
2. ‘DY 4’   =  ‘What Is The Depth Of Water Where The Vessel Sunk?’.

• ANSWERS TO A QUESTION OR REQUEST MADE BY THE BASIC SIGNAL.

Examples: