|The Sting has both instruments, which are Navman 100 series mounted on the cabin bulkhead. |
The depth transducer is located in an aft corner of the forward/centre V-Berth compartment. The transducer held vertically by being imbedded in a large lump of silicon which is free of any air bubbles. I have also placed it where there is only the hull lay up of glass ie no extra glass due glassing in of bulkheads etc. This location has proven to be sensitive enough and only rarely does the sounder have any problems with air bubbles in the water.
The log paddle wheel is mounted through the hull on the starboard side ahead of the drop keel where there is a double skin. I cut approximately a 100 x 100 hole in the inner furniture skin and glassed it the hull forming one layer, an appropriate sized hole was then cut in the hull with a hole saw. This paddle wheel position has enabled the yacht to be launched and retrieved without catching the trailer it is also well clear of the sand etc when we dry out on a beach. Due to log failures over the years changing the hole size in the hull has not been any problem, the current log unit is about 10mm in diameter smaller than the previous.
Having had a number of logs in 2 RL24's I find the current Navman 100 series excellent. Especially the paddle wheel as it never catches anything, previous brands would pick up weed etc and jam regularly in weedy areas.