Are the objects circled wrecks?

Trying to find new spots by looking at maps.what sort of boating safety course did you take ? The USCGA course I took in 1975 covered this, anchoring techniques, knot tying, navigation and more. It was at an adult education setting in a high school and was 8 or 10 Tuesday nights IIRC. The Nassau County Police course I took in 2007 or so was a waste of two days but gave us a shiny plastic card, lol. It was geared towards jet ski shit. Somewhere in between was an online USCG course.
Are the objects circled wrecks?
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