Animated Knots

Publisher Info

Ketchikan Yacht Club (KYC)
P.O. Box 6694
Ketchikan, Alaska 99901

Roger Maynard

The Ketchikan Yacht Club (KYC) is a domestic non-profit corporation, registered and licensed to do business in the State of Alaska. The Ketchikan Yacht Club blog is an information service for members and guests, and a public advertisement for the Ketchikan Yacht Club.

Boating and navigation information in this blog is published in good faith based on the best information available including local knowledge, but is not intended to replace authoritive sources. Mariners are cautioned to use all authoritive sources when planning trips or operating a boat.

The Ketchikan Yacht Club is organized as a social and recreation club under section 501(C)(7) of the U.S. Tax Code; contributions are not tax deductible.

Navigation | Safety

Tongass Narrows Ship Traffic
Now we can view Ketchikan area AIS signals in real time

The Automatic Identification System (AIS) is an automatic tracking system used on ships and by vessel traffic services (VTS) for identifying and locating vessels by electronically exchanging data with other nearby ships, AIS base stations, and satellites. When satellites are used to detect AIS signatures then the term Satellite-AIS (S-AIS) is used. AIS information supplements marine radar, which continues to be the primary method of collision avoidance for water transport. (Wikipedia)

Although AIS has been in use for several years, there has been no base station to receive and report Ketchikan area traffic to the Internet. Thanks to ham radio operator Neil Ensign (N7ZYS) of Ketchikan for establishing a base station that makes this possible. The receiving antenna is centrally located in Ketchikan, and reliably receives ships from Ship Island (north of Ketchikan in Clarence Straits) to Bold Island (south of Ketchikan in Revillagigedo Channel.)

Other similar land-based receiving sites make it possible to view traffic in the vicinity of Glacier Bay, Juneau, Sitka, Wrangell Narrows and Prince Rupert. For more information, visit

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