Proper Use of VHF Channels at Sea

Applicable to: Owners, Masters, Officers of Merchant Ships, Owners and Skippers of Fishing Vessels, Port Authorities

Effective Date: 22nd Nov, 2006

Superseded Circulars: None mentioned

Key Changes and Requirements

VHF channels must be used in accordance with ITU Radio Regulations. Key points include:

Channel 16: Only for distress, urgency, safety, and brief calling. Switch to working channel after contact.
Channel 70: Digital Selective Calling only, no oral communication.
Port/VTS Channels: Operational handling, ship movement, and safety messages only.
Identification: All signals must be preceded by vessel's name or callsign.
Operator Certificate: VHF service must be controlled by certified operator.
Recording: All communications should be recorded in the requisition log book.

In Indian waters, the following channels are available for routine ship-to-ship communications:

Channel 13: Worldwide navigation safety communication channel. May also be used for ship movement and port services.

Important Note

Misuse of VHF channels can cause serious interference and endanger safety at sea. All users must ensure compliance with ITU Radio Regulations.

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