Gene, First off, congrats on the platinum ring. Excellent recovery.
I'm not familiar with the 3-page article you mention. But I did notice in the updated manual that it suggests turning the Seawater function off when out of the water or inland. I won't argue with the person who wrote that in the manual. But it is my understanding that SeaWater option was engineered to allow the CTX to operate with a higher level of sensitivity in and along the water, without becoming unstable. To me, this is another one of those "functionalities" that I suggest we each try out, to see how it performs in the sites we hunt. Even though I'm "land-locked" here in the middle of the United States for most of the year, I've almost convinced myself that there are a couple sites around here that I can run with a higher Sensitivity, with more stability, using the Seawater option. Especially with a quick sweep speed.
Gary Drayton had some good information on using the Seawater option for hunting in the trough, in his TreasureTalk blog post... http://www.minelab.com/usa/treasure-talk/ctx-3030-seawater-setting As you will see in his post, Gary is convinced that the Seawater option is an excellent tool for hunting along the surf.
Minelab's own Nenad Lonic also wrote a very informative article in his TreasureTalk blog post...... http://www.minelab.com/usa/treasure-talk/ctx-3030-the-best-treasure-detector-just-got-better As Nenad explains it, Seawater is a new specialist setting designed to optimize the performance of the unit when searching in salt water, with the biggest benefit being seen when the whole unit is submersed. Simply put, with Seawater selected the CTX 3030 will run smoother with less falsing, allowing you to set a higher manual Sensitivity setting - so depth is optimized while retaining stable operation. While testing it at a local beach, I found that it also had some merit when working the water line, as the extra stability meant I could increase the Sensitivity setting to improve depth, and found that I could sweep the coil faster than I normally would without sacrificing depth or accuracy of the ID
