Hi Ian, I've not been on Treasurenet for a while, I am working over the border in Bosnia and have just come back from 10 days on the Coast around Šibenik, I took 2 Scuba Tectors with me to try them out with my Son, they look like childrens toy spades, very small, we used them under the water while swimming up to around 3m from the beach, although not finding any rings or jewellery we found about 23 coins of varying description and even a small blob of what I think is Silver... are you an active detectorist in Croatia and where in the Country are you?