Join Date: Dec 2008
Location: Calgary, AB, Canada
Thanked 72 Times in 67 Posts
Rep Power: 8
Re: Dead Reckoning
How do you stop the water when you pull the thru hull knotmeter? I have two old thru hull knot meters in my boat. Will remove all and glass in a patch on next hull out as I fear them getting knocked out and hole the boat. Which leads to next question: Why do not all these thru hull knot meters and depth sounders not require a seacock shut off? Seems these plastic "plugs" are an accident waiting to happen. Seems they could be designed to be insert into a seacock and if they were knocked out or started leaking you could pull them out and shut the seacock.
Knotmeters must have a blank plug that is used when the knotmeter is pulled.
"Modern" knotmeters have a flap that stems the flow when the knotmeter is removed.
Wooden plugs can be stop the flow from a broken thru-hull.
ISPA Yachtmaster Ocean Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
ASA 201, 203, 204, 205, 206, 214
As I sail, I praise God, and care not. (Luke Foxe)
Last edited by jackdale; 05-07-2012 at 04:54 PM.