What is Morse code by light called?

Answer 1

To use Morse Code using light, you need a hand held torch which has the ability to switch on and off by use of a button preferably. In the Royal Navy and most other Navies a 5 inch hand light (close signalling), 10inch light (mid - horizon signalling) and 15 inch lights (horizon signalling) are used.

You must ensure that the light is pointed directly at the receiver at all times any stray movement can result in the receiver not seeing the letter or even message being sent.

Simple press and release the button on your light quickly or slowly to indicate a dot or a dash. Leave a long period between words, so as not to confuse the receiver, also wait until the receiver gives one long flash to indicate they received the word correctly.

If you make a mistake during a word you need to give 8 dots which indicates an error, you then resend your word.

Answer 2

Gday, in the most of the Western World Navies, all visual communication comes under the banner of VS or Visual Signalling (at least it used to when I was in) - this includes Morse code by light, semaphore and flaghoist.

In the Australian Navy, a command would be made to 'send signal by light'.

Morse code by light is just that... Morse code.

Hope that helps