Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 18-03-2012, 23:17   #1
Senior Cruiser

Cruisers Forum Supporter

Join Date: Dec 2006
Location: Seattle
Boat: Cal 40
Posts: 2,376
Images: 7
Rescue 21 RDF

Anyone know how long your transmission has to be for the USCG Rescue 21 system to get an approximate fix by RDF?

I've heard the Coast Guard ask for assistance more than once in locating a vessel after they heard a brief message calling for help. I know it always took me a long time finding the null on a manual RDF moving the antenna back and forth by hand for navigation, just wondering how fast the new Rescue 21 system is presumably with computer controlled ADFs.

cal40john is offline   Reply With Quote
Old 19-03-2012, 05:22   #2
Certifiable Refitter/Senior Wannbe
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 6,324
Re: Rescue 21 RDF

Just by looking at their direction antenna setup in their promotional photos, it should be almost instantaneous to get a LOP or at least no more than a few seconds. However I have no idea how long it would take to get a 2nd or 3rd LOP in order to get a fix. I assume that would depend on how many other VHF ADF's are nearby and their relative positions.
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale: Barient 21 Bronze Winches (Pair) Kikorangi Classifieds Archive 3 31-03-2012 08:55
2012 West Wight Potter 19 White $21,995 West Wight Pott Commercial Posts 2 18-03-2012 07:29
Boston Boat Rental May 18-21 2012 s/v Beth Atlantic & the Caribbean 0 01-03-2012 12:55
Rescue authority zones and contacts Hugh Walker Health, Safety & Related Gear 5 25-02-2012 16:33

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 00:10.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.