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: I wonder how much celnav experience they had...
    From: David Pike
    Date: 2018 Feb 22, 09:39 -0800

    I wonder if they had the boat surveyed before they bought it. It seems like a sailboat could not be going fast enough to knock the keel off, unless there were structural issues.

    You don’t need to be going very fast in a fin keeled vessel to get quite a jolt if you hit something heavy enough and solid enough.  It’s certainly enough of a jolt to almost throw someone off the vessel and make you fear grave damage either below waterline, around the bulkheads, or at the chain plate attachments.  It's not so much the speed as the deceleration.  Even if you experience a soft grounding, if there’s any tide under you, the vessel will within a few seconds be on her side swivelling about her fin shedding vortices bow and stern causing a wrenching effect on the fin. 

    There’s no suggestion in the article of hidden weakness in the hull.  With the number of Columbia 28s built and the time they’ve been sailing, there can’t have been much wrong with the basic design or construction.  A previous owner’s assessment of possibly the very same yacht appears here http://www.columbia-yachts.com/c-28info.html .  As with any 49 year old vessel, one can’t entirely rule out a previous knock causing weakness, which a sharp eyed surveyor might or might not have spotted.  The Columbia owner’s site also mentions some 28s having suffered keel bolt corrosion, but how serious and how easy to check each of the seven bolts without time consuming and expensive X-rays or withdrawal isn’t stated.  DaveP


    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