| Navy Requirements: | |
| Annual sustaining certification audit | |
| Overhaul at least every five years | |
| Hull inspection every five years (currently under review) | |
| 1989 | February - Hull inspection |
| August - Overhaul completed | |
| August - Sustaining certification audit | |
| 1990 | March - Sustaining certification audit |
| 1991 | June - Sustaining certification audit |
| 1992 | August - Overhaul started |
| 1993 | February - Hull inspection (delayed until 1996) |
| March - Overhaul completed | |
| March - Sustaining certification audit | |
| 1994 | May - Sustaining certification audit |
| 1995 | May - Sustaining certification audit |
| 1996 | (Hull inspection) |
| May - Sustaining certification audit) | |
| 1997 | (May - Sustaining certification audit) |
| 1998 | (Overhaul) |
| (Sustaining certification audit) |