I was surprised to find on an old USGS map (while researching a typo in the GNIS; it turns out the National Map Team is very responsive, they fixed the typo within 48 hours of reporting it) that there used to be Coast Guard navigation lights on the Ohio River. Makes perfect sense in hindsight, just never dawned on me that they would have responsibilities on large navigable rivers as well.

Very cool. One bug I noticed though is if you continue to zoom out you lose some and then all lights. Or it's almost like it only shows the first X lighthouses?

Nothing in Michigan? The state with the most light houses out of any in the US?

Cool app.

Might want to warn about seizures and migraines, though. Some people are sensitive to flashing lights.

On Mac Safari, holding shift and using the magic mouse to scroll up or down reverses the zoom direction.

This is both right (Shift-X is the reverse of X due to convention) But is also wrong (Shift-Scroll is the macOS gesture for scrolling on maps where Scroll alone doesn't zoom in or out).

TLDR: I really wish Apple would adopt the "scroll up to zoom in" convention used by the rest of the free world.