For those interested, this sounds like a great adventure. I wanted to do this last year, but couldn't fit it into my schedule.
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2007 Delaware Bay Lighthouse Adventures

"THE BIG TRIP" Saturdays in 2007:
May 19, June 23, July 21, August 25 and September 15

Take a cruise up the Delaware Bay aboard the Cape May Whale Watcher for a superb lighthouse viewing experience. See and photograph historic lighthouses which were built during the late 19th and early 20th centuries as aids to ships sailing the treacherous mid-channel of the Delaware Bay. Most of these lighthouses stand on pedestals out of sight of land and are still operational. Each cruise also includes narration on Delaware Bay lore and legend, including information on fishing, spawning grounds, and more.

See all of the Delaware Bay lighthouses viewable by boat: Cape May Lighthouse, Harbour of Refuge (Lewes); Delaware Breakwater East End (Lewes); Brandywine Shoal; Fourteen Foot Light; Miah Maull Shoal; Cross Ledge; Elbow of Cross Ledge; and Ship John Light… all in one excitement-packed seven-hour trip!

Cruises depart at 10 a.m. from the Miss Chris Marina, 2nd Avenue and Wilson Drive, and include complimentary coffee and Danish in the morning, followed by a lavish complimentary cold luncheon buffet including shrimp, finger sandwiches, cheese and fruit trays, and dessert. A cash bar is available.

Delaware Bay Lighthouse Adventure - $99 Per Person

Here's the link:
Delaware Bay Lighthouse Cruise