Navionics - Little red boxes with the black + signs in them - coral at what depth?

[thejerbear]

Hello,

Looking that Navionics, it's my understanding that the little red boxed with black + signs represent coral heads. What I can't figure out how I know what depth these coral heads are at. Generally I would just avoid, but looking at this zoomed in shot of Nanny Cay Marina, BVI, it looks like there's coral both obstructing the marina fairway and right in-between the buoys? Is this submerged below the charted depth, or, at the water line, or other?

[StuM]

It means "rocks" If you click on one you should be able to get more info


Note, it may say "Always under water" or "Covers and uncovers" and it may or may not give a depth if it is "Always under water"

[thejerbear]

Thank you! I'm working off my laptop and was missing the "double click." I have a whole lot to click on it seems. Cheers!

[SailingHarmonie]

Also, navionics in most systems has a "rock filtering" setting that hides rocks that are deeper than a depth you specify. It can significantly de-clutter your screen by eliminating stuff you don't care about. (If you have a 5 foot draft, do you really care about a rock that has a minimum depth of 20 feet?)