Grade 11 – Nautical Science

October 31, 2020

Distress messages (MAYDAY)

A distress call and message is sent when a vessel is in grave and imminent danger. They are only sent on the authority of the master or person responsible for the vessel. A distress call has priority over all other transmissions. All stations receiving a distress call and message must […]
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October 31, 2020

Urgency message (PAN PAN)

An urgency message indicates that the station making it has a very urgent message to transmit concerning the safety of the mobile unit or person. It is only sent on the authority of the master or person responsible for the ship. The urgency signal will have priority over all other […]
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October 31, 2020

Safety message (SECURITE)

The use of the safety signal implies that the station making the call has an important navigational or meteorological warning to transmit. All stations hearing the safety signal shall listen to the safety message until they are satisfied that the message is of no concern to them. It should take […]
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October 31, 2020

Good radio procedures

When using a radio one should bear the following in mind: Unlike your telephone it is not a private circuit. Anyone who has a radio covering the same frequency can listen in. There may be many users waiting to use the same circuit. Your use of the radio must be […]
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