M21
| Drawing Information: | |
|---|---|
| Category: | Real Designs |
| Country: | Great Britain  |
| Type: |
Coastal Defence Vessel 
» Monitor |
| Class: | M15 |
| Ship: | M21 |
| Operator: | Military |
| Date Depicted: | 1915-5 |
| Date Submitted: | Nov 28, 2018 |
| Last Revised: | Mar 17, 2024 |
| View(s): | Starboard Elevation |
| Author(s): | Lurian, |