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  1. #41
    Join Date
    Nov 2004
    Location
    Stirling
    Posts
    14,464

    Default Re: AIS - essential kit these days for channel crossing?

    We are finishing the fourth season in our present boat. Prior to that we had no chartplotter, AIS or radar (or electric windlass for that matter...).

    While we had years of great sailing with our old Roberts 34, I really would not want to go back to doing without these "luxuries". Like the OP, we tend to sail in fairly light shipping areas, but both radar and AIS are more or less indispensable for us nowadays. After experiencing thick fog on a recent passage across the North Sea, and, again, most of the way from Sumburgh Head to Fair Isle, we decided to go the extra mile by upgrading from AIS receiver to tranceiver.

    As the MAIB report on the Priscilla's grounding in the Pentland Firth shows, there is no absolute protection against being run over by a badly managed ship, but radar and AIS transmission and reception certainly helps.

    See and be seen!
    Last edited by Sgeir; 04-10-19 at 10:00.
    Ω

  2. #42
    Join Date
    Nov 2009
    Location
    Home UK Midlands / Boat Croatia
    Posts
    20,237

    Default Re: AIS - essential kit these days for channel crossing?

    Quote Originally Posted by awol View Post
    We've been here before. A transponder is a device that responds to a received signal by transmitting its own. Examples are the Echomax that transmits when wiped by a suitable radar beam and a SART that does the same.
    A transceiver is a device like a marine VHF radio or an AIS that can transmit and receive signals
    Your own definition may vary but that's your problem.
    Errrrrr ..... your definition is the same as mine so if it's my problem, then it's also yours.

    Richard

  3. #43
    Join Date
    Jan 2005
    Location
    Me Edinburgh, boat JWD
    Posts
    5,150

    Default Re: AIS - essential kit these days for channel crossing?

    Originally Posted by RichardS
    [pedant] An AIS device that receives and transmits IS a "transponder".[/pendant]
    Oh, no it's not!

  4. #44
    Join Date
    Nov 2009
    Location
    Home UK Midlands / Boat Croatia
    Posts
    20,237

    Default Re: AIS - essential kit these days for channel crossing?

    Quote Originally Posted by awol View Post
    Oh, no it's not!
    Hmmmm ..... the the light of your post #40, you might want to rethink this.

    Richard

  5. #45
    Join Date
    Jun 2019
    Location
    Cowes
    Posts
    596

    Default Re: AIS - essential kit these days for channel crossing?

    Quote Originally Posted by Pete7 View Post
    I would have thought IRPCS Rule 5 would suggest at least AIS Rx.

    Pete
    How do you mean? Nobody is obliged to fit anything to any typical size, private yacht, and a means of keeping a lookout is only 'available' if it is fitted, working and useable, and there is a spare crew member trained to use it.
    For example, you might not want to flatten your battery by using radar, so it would not be 'available', and switched off.
    Or, you might be doublehanded in rough conditions, and not want to have a person on watch, for the sole purpose of fiddling with gadgets, so the AIS would not be 'available'.
    Last edited by Ohlin Karcher; 04-10-19 at 10:17.
    "Now shall the gentleman haul and draw with the mariner"
    John Hawkins

  6. #46
    Join Date
    Jan 2005
    Location
    Me Edinburgh, boat JWD
    Posts
    5,150

    Default Re: AIS - essential kit these days for channel crossing?

    Quote Originally Posted by RichardS View Post
    Hmmmm ..... the the light of your post #40, you might want to rethink this.

    Richard
    So you believe that an AIS transceiver responds to a message from another transmitter by automatically transmitting? I and the relevant standards think otherwise.

  7. #47
    Join Date
    Apr 2011
    Posts
    277

    Default Re: AIS - essential kit these days for channel crossing?

    Quote Originally Posted by Lightwave395 View Post
    Sadly I can't afford a four figure sum for radar
    Bought my Radar off Ebay secondhand for £400....Just saying.

  8. #48
    Join Date
    Jun 2019
    Location
    Cowes
    Posts
    596

    Default Re: AIS - essential kit these days for channel crossing?

    Quote Originally Posted by Seajet View Post
    Thanks Channel Sailor, you've given me something new to consider - my funding would also be either not both.
    Go for RTE Seajet, I entreat you.
    "Now shall the gentleman haul and draw with the mariner"
    John Hawkins

  9. #49
    Join Date
    Aug 2016
    Location
    Me in Cowes, boat in Quiberon
    Posts
    410

    Default Re: AIS - essential kit these days for channel crossing?

    Quote Originally Posted by Parabordi View Post
    Bought my Radar off Ebay secondhand for £400....Just saying.
    I am looking, however, having had Furuno on my J44 some years ago and more recently experienced digital I'd now prefer solid state which seems unsurprisingly to jack up the price somewhat...

  10. #50
    Join Date
    Sep 2010
    Location
    West Sussex / Hants
    Posts
    28,771

    Default Re: AIS - essential kit these days for channel crossing?

    I have a JRC Vigil II radar, digital so a very short warm up and standby mode so I can turn it on for short bursts for a look around - no way could my boat power it to run constantly but it's nice to have an active sensor.

    Of course I've never been caught in fog since I bought it, so money well spent !

    Ohlin Karcher,

    message received, I will probably go for RTE though I like the Wacky Races ' they're over there ' display of AIS.
    Anderson 22 Owners Association - For info please ask here or PM me.

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