If you were born before the 1960s (like the author), you may remember the old days of the party line telephone — no privacy, you picked up your home phone and if someone else was on the line you had to wait your turn so you didn’t interrupt the call in progress. VHF has a similar social component and is truly one of the first commonly used mobile communication devices. Like the party line, however, everyone in range can listen in to your conversation when you are on the air. For the uninitiated, and until you are familiar with the basics, it can be a bit intimidating. Many novices get “stage fright” and don’t want to click the mic. There is no mystery, this is truly a very simple and easy-to-use device.
The sound signal transmitted through the airwaves has a range based on the height of the antenna. In theory, you can be heard through any other VHF unit within that same line of sight range. Most boats that I’m on have a communication range of about 16 miles. This range is influenced by what type of equipment you are using, who you are connecting with, settings, antenna height, and local atmospheric conditions.
この記事は Ocean Navigator の November - December 2020 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
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この記事は Ocean Navigator の November - December 2020 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です? サインイン
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