The Symbols for Boat Signals are -

1. Two square flags, or handkerchiefs, or pieces of cloth.

2. Two long strips of cloth, or parts of a plank, or pieces of wood longer than broad.

3. Two balls or hats, or round bundles, or buckets.

With these any of the Distance Signals can be made - holding the Symbol at arm's length; and the Signal is to be made from right to left and read from left to right, thus:

Equivalent to Ball above Pennant, or, "You are running into danger."

In making Boat Signals it is important to use only the proper means to attract attention, and to avoid those that may occasion confusion or misinterpretation.