Marine VHF radio uses the radio frequency range between 156.0 and 162.025 MHz, called the VHF maritime mobile band. A marine VHF set is a combined transmitter and receiver (transceiver) and operates only on standard, international frequencies known as channels. Channel 16 (156.8 MHz) is the international calling and distress channel. Transmission power ranges between 1 and 25 watts, […]

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NAVTEX is a system for broadcast and automatic reception of maritime safety and weather information. NAVTEX is part of the MSI, Maritime safety information, that is broadcast to mariners by official agencies for their safety. Maritime safety messages consist of messages such as weather warning, warnings about dangers to navigation and failure of navigation devices. These […]

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Crossing Borders

“Crossing Borders” Once, walking my way to Alaska and closing up on a border town, I spotted on my left hand this sign just across the border. It said “First Chance”! Some hours later, on my way out of town again, I spotted to my right a sign saying “Last chance”. I crossed the border, and after some steps I stopped and looked […]

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GMDSS Part 2

THE GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS) Functional Requirements The GMDSS provides that every ship, while at sea, shall be able to perform the following nine basic communication functions: transmitting ship-to-shore distress alerts (by at least two separate and independent methods); receiving shore-to-ship distress alerts; transmitting and receiving ship-to-ship distress alerts; transmitting and receiving search […]

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GMDSS Part 1

THE GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS) Introduction The Global Maritime Distress and Safety System is the technical, operational and administrative structure for maritime distress and safety communications worldwide. It was established in 1988 by the International Maritime Organization (IMO) which adopted a revised text of Chapter IV of the International Convention for the Safety of Life […]

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Welcome to Arlo Maritimes “Do You Know?”-page. This is where we will tell you interesting facts about the aspects around. Global Maritime Distress and Safety System (GMDSS), Search and Rescue (SAR) and Coastal Services. Enjoy the page and we hope you will benefit from it. Safety at Sea is very important.

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