Following to the "ITU Manual for use by the Maritime Mobile ...
Following to the "ITU Manual for use by the Maritime Mobile Satellite Services" the "IMO Standard Marine Communication Phrases- SMCP" establishes GMDSS (Global Maritime Distress Safety System) standard distress, urgency and safety messages. These messages must be transmitted by the VHF Channel 16 or frequency 2182 kHz.
How should be commenced a Standard SAFETY Message?