| Chattahoochee (Confederate gunboat) | 6 |
| Underwater archaeology--Georgia | 6 |
| Shipwrecks--Anguilla | 3 |
| Shipwrecks--Bermuda Islands | 3 |
| Underwater archaeology--Anguilla | 3 |
| Underwater archaeology--Bermuda Islands | 3 |
| Diving--Training--North Carolina--Greenville | 2 |
| Adams, Jim, 1953 or 1954- | 1 |
| Aircraft accidents--Hawaii | 1 |
| Catalina (Seaplane) | 1 |
| Marine archaeologists--Hawaii | 1 |
| Marquette (Mich.)--History, Naval | 1 |
| Michigan (Paddle steamer) | 1 |
| Ordnance | 1 |
| Pearl Harbor (Hawaii), Attack on, 1941 | 1 |
| Rodgers, Bradley A. | 1 |
| Shipwrecks--Michigan, Lake | 1 |
| Shipwrecks--Virginia--Yorktown | 1 |
| Shipwrecks--Wisconsin | 1 |
| Strikes and lockouts--Iron mining--Michigan--Marquette | 1 |
| Underwater archaeology | 1 |
| Underwater archaeology--Hawaii | 1 |
| Underwater archaeology--Michigan, Lake | 1 |
| Underwater archaeology--Virginia--Yorktown | 1 |
| Underwater archaeology--Wisconsin | 1 |
| Underwater archaeology--Wisconsin--Green Bay | 1 |
