| Reference Number | S5/A41/1261 |
| Catalogue Level | Item |
| Title | Plan: Port St Mary Breakwater Extension Cross Section |
| Date | Undated [early-mid 20th century] |
| Description | Structure or Place: Port St Mary Breakwater. |
| Notes | Port St Mary |
| Access | Open |
| Extent | 1 sheet |
| AltRefNo | C740 |
| 1262 |
| PBD/264 |
| AccNo | A41 |