Strongly recommend that you review Metal Detecting Hawaii videos by Pat before leaving.
Pat and an associate are located on Oahu, and have prepared videos of hunts over several years.
You might even be able to go out for a hunt with him if you give him a call - he is friendly toward visitors.
Not sure why you would want to detect Kauai as it has far less visitors than Oahu, and more of them are eco type rather than the rich who would be more likely to carry valuable jewelery.
As there is no continental shelf to slow waves down, in Hawaii even small waves there are very powerful.
They can easily pick you up and drag you out to sea, or you can be hit by objects in them.
One Rule to follow on all sides of the Island is Never, I repeat never, turn your back on the ocean.
Protected lagoons would be far safer to hunt as long as you stay away from the holes in the reef as .there can be a strong current when the tide changes.
Another tip is to stay away from monk seals, they are protected, and you could get arrested if you get to close to one or hurt if you accidently trip over one at night; they are not easy to see (look like a log or rocks along the beach) when hunting at night.
As you are near the equator, you really have to protect yourself against the sun.
Where brimmed hats, SPF 50 Sun Block, be especially carefull to protect your lips, rash gaurd in the water,
protective sun glasses (poloroid to see in the water)
Recommend staying out of the sun between (11AM to 2PM) to avoid getting fried,
Leaving Friday for 9 days. have both units but very little experience with either. recommendations??
