Hi Dan I believe most current model speed instruments measure boat speed thru the water using paddle wheels. I know Raymarine does. The Raymarine i50/i60 tri pack that we purchased in 2014 uses a paddlewheel transducer for speed.
As others have said Boat Speed is very important for sail trim. GPS speed over ground is better for navigation but not as useful for trim since is affected by currents. Mike Persistence Halifax From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Dan via CnC-List Sent: Friday, September 14, 2018 2:04 PM To: cnc-list@cnc-list.com Cc: Dan Subject: Stus-List padwheel analogue thru hull device Hi all, I'm doing an overhaul of my electronics, and I have a general question for those of you who have been through this before - Are the classic Padwheel Speed Measuring instruments still worth keeping or have they gone the way of the Steam Engine? I'm pretty sure most Depth Transducer readers now mathematically calculate your speed from comparative readings, and just about any GPS device including your phone will give your speed through any plotting software... So what do I do with this old padwheel? - disconnect and plug or patch over the hole on the next haul out? Dan Breakaweigh C&C44 Halifax, NS
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