Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: lights and shapes
    From: Trevor Kenchington
    Date: 2003 Jun 12, 16:03 -0300

    Jared Sherman wrote:
    >  Nevertheless, if I saw a sailboat showing the day shapes for "under power" 
    I would be even more astounded. They simply are not used in US waters, and I 
    don't even recall seeing them on the tall ships here for OpSail, including 
    our own USCG training bark.
    The crew of "Kruzenshtern" (Russian four-masted barque), when I said on
    her last summer, were punctilious about running a cone, apex downwards,
    to the fore weather yardarm every time the engine came on with the sails
    set, though the barque would have been on top of any other vessel before
    the latter's crew noticed such a small shape amidst such massive rigging.
    "Kruzenshtern" also carries steaming lights when motor sailing at night
    -- even though her topsails obscure those lights when seen from ahead.
    Not very helpful.
    >  There is nothing however that would stop a sailboat from using the same 
    signals to show the same condition. Or, a simple flag signal. Of course flag 
    signals can also result in rampant confusion. Here the fuel barges all fly 
    the Bravo flag (Explosives on board, stand clear) but the racing boats all 
    fly a protest flag that looks remarkably similar and I'd hate to bet how many 
    sailors couldn't tell the two apart.
    Bravo hasn't meant "Explosives on board" since the International Code
    was revised in, I think, 1972. Don't quote me but I think it is "I am
    carrying, loading or discharging dangerous substances", which seems to
    include all forms of petroleum.
    But the conventional (not obligatory) yacht racing protest flag _is_ the
    Bravo flag of the International Code, not merely similar to it, just as
    many class flags are IC flags used with quite other meanings to those in
    the code book. I guess you just have to know when a signal means what
    the books say it should mean versus when it means something completely
    Trevor Kenchington
    Trevor J. Kenchington PhD                         Gadus@iStar.ca
    Gadus Associates,                                 Office(902) 889-9250
    R.R.#1, Musquodoboit Harbour,                     Fax   (902) 889-9251
    Nova Scotia  B0J 2L0, CANADA                      Home  (902) 889-3555
                         Science Serving the Fisheries

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site