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OICNW-4-1A

Flashing Light

Function: Navigation at the operational level

Competence Knowledge, Understanding & Proficiency Task

Transmit and receive information by visual signalling

A8.2 Ability to transmit and receive, by Morse light, distress signal SOS as specified in Annex IV of the International Regulations for Preventing Collisions at Sea, 1972, as amended, and appendix 1 of the International Code of Signals, and visual signalling of single-letter signals as also specified in the International Code of Signals

Flashing Light

Assessed in: MT-4122 Global Maritime Distress and Safety System

Condition

On a ship or in a laboratory using a device by which sends flashing light messages at a speed of 4 wpm; when sent two messages, the first consisting of the following:

  1. DE followed by a four-(4) letter identity signal, sent once;
  2. YU: Indicating that a Code Group follows, sent once;
  3. Text: Five random five letter groups, each of which is repeated twice; and,
  4. Ending: AR;

and the second consisting of:

  1. DE followed by a four letter identity signal, sent once;
  2. YU: Indicating that a Code Group follows; sent once;
  3. Text: Five three character code groups, each of which is sent twice;
  4. Ending: AR.

Behavior

Read the Morse code flashing light signals, record the letters and numbers of the entire message, and interpret the code groups in accordance with H.O. 102.

Standard

  1. Record the letters of the message; and,
  2. Achieve a minimum passing score of 70% scored as follows:
    1. three points are given for each correct character of the five random five letter groups for a possible total of 75 points; and
    2. five points are given for each correct plain language interpretation (candidate must look up the meaning of the code groups in H.O. 102) of each of the five code groups for a possible total of 25 points.