Lisle – If I understand your description correctly, yes it would be good to have at least the depth closer to horizontal. Mostly for accurate readings and area coverage. How you achieve that can be a long explanation but would be a combination of building up material (West System or other) on the inside and outside of the hull to make the two surfaces parallel.
Airmar makes almost all transducers for instrument manufacturers. I used all the same thru hulls when replacing my old datamarine. FWIW; I have mostly Garmin now, but also B&G, on a N2K network. Those two play very well together and each have their +/- for data display, usability and configurability. I believe Garmin anemometer is the best in the business. My personal experience is Raymarine doesn’t play well with others. Spend time running different displays at your local boat show to get a feel how they operate. Hope that helps. From: CnC-List <cnc-list-boun...@cnc-list.com> On Behalf Of Lisle Kingery, PhD via CnC-List Sent: Thursday, March 5, 2020 2:11 PM To: cnc-list@cnc-list.com Cc: Lisle Kingery, PhD <lisle.king...@gmail.com> Subject: Stus-List input on thru-hull issue Hello all, I have been a lurker on the list for 3 years now, was seriously considering a C&C 30 in 2017 but ended up buying a 1986 Caliber 28 in August, 2018. Despite not landing on a C&C, I continue to actively follow the posts on the listserv as I have found them most useful and I don't do Facebook, and I would appreciate, although not being a C&C owner, if folks on the list have thoughts they would be interested in sharing on the issue below. The project I'm doing is replacing old and slightly leaking knot meter and depth sounder. There was a copious amount of LifeCalk applied around the fittings inside the boat and at launch last spring there was a very very small leak that was stopped for the season with yet more application of LIfeCalk. The boat has 2 thru hulls forward of the keel and the knot meter hole size is 2-1/8" as it is an old SR Mariner knot meter with a flanged fitting. The depth sounder is an old DataMarine Corinthian II model with a 2" Thru Hull hole, no flange. The issue I'm facing is that after I removed the Thru Hull fittings, it appears that the hole for the knot meter is flanged at about a 45' angle and the SR Mariner Thru Hull fitting is flanged at 30" so there is a bit of wiggle room so to speak and it's not as flush as I would think it should be. It's the original unit as far as I know so it apparently was fine for many years. My question is - is there a way I can try and "build up" the area around the flange so that the fitting fits more closely, or is this sort of clearance OK to leave as is with the assumption that the sealant is capable of filling this void without significant concern of failing assuming it's applied properly. Also, if anyone has thoughts on what best NMEA 2000 package to put in for depth, speed, and wind, I would be interested in thoughts there as well. I'm looking at Garmin and B&G thus far. The old Stowe anemometer doesn't work so I'm planning on upgrading the entire system. Thank you, Lisle
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