underwater detector

If I bought a handheld underwater detector like the attached picture and I was diving just right offshore in 10 - 20 feet of water and I'm hoping to find gold/silver coins and gold/silver rings, what is the best operating frequency and why? Also, in the owner's manual it talks about frequency...

My Nokta PulseDive Underwater Metal Detector failed on me after going into the water (and not even using it). When I came back on land, although I could turn it on, I couldn't detect metal. Maybe some water got into it. I'm looking for something that is handheld so about 15" long. I would be...

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Hello to all, This is my first post on treasurenet so please be gentle...My question is about towing a PI detector coil on a sled behind a boat. The wreck I am searching for is in 100-150' deep water and am wanting to detect cannons & anchors etc within my budget (Magnetometers will do the job...

Hi we live on the Sothern Coast of Spain. We moved to Spain 12 years ago from the UK but since being here have not been detecting!! We are surrounded by literally hundereds of miles of beaches with thousands and thousands of tourists visiting yearly. Since living here I have never seen one...