Forms of Signalling

This page is courtesy of 1st Wexford (New Ross) Scouts.


Visual communication using positions of two flags for each letter of the alphabet. Can be used at sea or on land but the sender and the receiver must be within visual range ... Read More

Morse Code

Audio communication using a single tone. The tone has two different lengths, long (dash) and short (dot). A letter is made up of a sequence of dots and dashes, a pause indicates the break between a letter, word, or sentence depending of the length of the break. Even though it is a primarily audio means of communication, the dots and dashes can be represented by a lot of things to enable visual communication. The prime example of this is light, i.e. a short flash of light indicates a dot and a long one indicates a dash ... Read More

International Code of Signals

This is the method of communicating to sea going vessels of the status of a particular vessel. There is a different flag for each letter of the alphabet, the colours on the flag are arranged to that the meaning of the flag can be determined from just the shape of the design, without having to know its colours. As well as each flag being assigned a letter, a meaning was given to an individual flag, examples would be the letter B, this flag was a solid red colour and meant that the cargo the vessel was carrying was dangerous or flamable. These flags would be hoisted up on the ship ... Read More

Phonetic Alphabet

The Internationally recognised phonetic alphabet is common to radio enthusiasts, both amateur and the C.B. operator. However many other phonetic sounding words may be heard over the air, this seems to be the most recognised ... Read More

Radio Telephony

The method of using radio telephones. It examined the proper use of the radios and how to initiate distress calls and other types of calls.