gps tracker for swimming

Figure I should ask the OW swimmers since this will be the primary purpose for my use. Need some guidance shopping around for a simple gps tracking device I can wear while swimming in nature. Few features needed, just something that I can use to review where I swam and the distance I traveled. It must be water proof to at least 10 meters. Is there anything affordable with a decent level of sampling rate? Though not necessary, are there any products that can log a graphic representation of swimming velocity in M/s? Thank you
Parents
  • I have used an inexpensive Garmin Forerunner 15 which I attach to my safer swimmer buoy. Here's an example of the kind of track data I get. (It says running but as you can see from the map it was swimming :) ) connect.garmin.com/.../1239642959 You can edit the activity type within Garmin connect. I have used my watch to track canoeing and hiking and just edit them from "swim" or "run" to "paddling" or "hiking"
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  • I have used an inexpensive Garmin Forerunner 15 which I attach to my safer swimmer buoy. Here's an example of the kind of track data I get. (It says running but as you can see from the map it was swimming :) ) connect.garmin.com/.../1239642959 You can edit the activity type within Garmin connect. I have used my watch to track canoeing and hiking and just edit them from "swim" or "run" to "paddling" or "hiking"
Children
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