| Abbreviations and Symbols | |
|---|---|
| * | Datum following inferred from contemporary documents |
| REG# | Army or Navy Registry Number |
| INSP | Initials of inspecting ordnance officer or other inspector |
| FDY# | Foundry number (founder's own internal control number) |
| GRVS | Number of rifling grooves, Right or Left hand twist |
| YR | Year cannon was completed and/or inspected |
| Alger | Cyrus Alger & Company, Boston MA |
| Columbia | Columbia Foundry, Georgetown DC |
| FPF | Fort Pitt Foundry, Pittsburgh PA |
| WPF or WPFA | West Point Foundry [Association], Cold Spring NY |
Listings are in bore size order. Within a given bore size, the sequence is guns, howitzers, and rifles. With each of these, the order is field, then siege.
Due to the closing of Mare Island Navy Yard, some cannon are already scheduled to be relocated at other Navy installations; several have already been moved. The exact location of each listed cannon is unknown at the time of posting. The webmaster would appreciate advice from anyone noting the new locations of the below-listed cannon when such occurs.
| FOUNDRY | REG# | INSP | FDY# | YR | WEIGHT | GRVS | COMMENTS |
|---|---|---|---|---|---|---|---|
| 24-pounder medium cannon for Sloops of War | |||||||
| Columbia | 31 | 24 | 31-?-10 | Alden Park, served on INDEPENDENCE | |||
| Columbia | 52 | 26 | Alden Park | ||||
| FPF | 807 | 26 | Alden Park, served on INDEPENDENCE | ||||
| 32-pounder chambered cannon, 42 hundredweight | |||||||
| Alger | 4 | ASW | 42 | 42-2-10 | Main Gate, served on WARREN | ||
| 32-pounder Bureau shell gun, 4500 pounds | |||||||
| FPF | 307 | *OCB | *3187 | 66 | 4545 | ||
| 8-inch chambered cannon, 63 hundredweight | |||||||
| WPFA | 26 | ASW | 41 | 63-0-02 | 2nd pattern, served on INDEPENDENCE | ||
| WPFA | 27 | ASW | 41 | 63-2-23 | 2nd pattern, served on INDEPENDENCE | ||
| WPFA | 48 | ASW | 41 | 63-1-26 | 2nd pattern, served on INDEPENDENCE | ||
| IX-inch Dahlgren shell gun | |||||||
| FPF | 916 | JMB | 1966 | 64 | 9205 | Bldg H 1 | |
| Total Civil War cannon at Mare Island Navy Yard, CA: 9 | |||||||