| Kohler, Robert D.; 1990 Lake Boats; 1990 | 1990 Lake Boats | 1990-00-00 | BURNS HARBOR | Chief Engineer |
| Kohler, Robert D.; 1994 Lakeboats; 1994 | 1994 Lakeboats | 1994-00-00 | WILLIAM R. ROESCH | Chief Engineer |
| Kohler, Robert D.; 1995 Lake Boats; 1995 | 1995 Lake Boats | 1995-00-00 | BUCKEYE | Chief Engineer |
| Kohler, Robert D.; 1998 Lakeboats; 1998 | 1998 Lakeboats | 1998-00-00 | BUCKEYE | Chief Engineer |
| Kohler, Robert D.; 1999 Lake Boats; 1999 | 1999 Lake Boats | 1999-00-00 | BUCKEYE | Chief Engineer |
| Kohler, Robert D.; Lake Boats 1996 | Lake Boats 1996 | 1996-00-00 | BUCKEYE | Chief Engineer |
| Kohler, Robert D.; Lake Boats 1997 | Lake Boats 1997 | 1997-00-00 | BUCKEYE | Chief Engineer |
| Kohler, Robert D.; ON Watch, Layup 2001 | ON Watch, Layup 2001 | 2001-00-00 | BUCKEYE | Chief Engineer |
| Kohler, Robert D.; ON Watch, Layup 2001 | ON Watch, Layup 2001 | 2001-00-00 | BUCKEYE | Chief Engineer |