Signals

There are many ways for ships to communicate.

The International Code of Signals using the code flags is just one and consists of 40 flags in all:

• 26 alphabetical flags e.g. A

  I have a diver down, keep well clear at slow speed.

• 10 numeral pennants
• 3 Substitutes
• code pennant

Signals are made of one, two, three and four flag hoists arranged in alphabetical order.