This 5-1/2 x 8-1/2" card provides a detailed depiction of the Ronald B. Johnson dive site in Fort Lauderdale, Florida. Each waterproof card is double sided, made of durable PVC plastic and is designed to be taken on the dive. They are also 3 hole punched to fit in standard log books.

On May 18, 1986, a 130 foot US Army dredge, the Corey N Chris, was sunk in 260 feet of water as part of the Broward County artificial reef program. Then, on May 15, 1988, a 226 foot freighter, the Ronald B. Johnson, was sunk as part of the same program. The R.B.J. landed, by accident, right on top of the Corey N Chris.

Today, these wrecks sit upright in 260 feet of water, joined by impact at their sterns.