The Undersea Ledge

So, now that we can hear each other again, lemme tell you what's been goin' on up here. Apparently we were off by like, a league. Somethin' about undersea currents, somethin' about the tides of time, yadda yadda. I think Zelling is getting rusty. Point is, you're not far off now. We're SURE that Marshal Valentine is right to the east of ya, in a shipwreck up on a ledge. Zelling says there's something else big up there too, but he can't tell what it is.