| Reference number | PB/4/9/2/5 |
| Previous numbers | D.153 |
| Level | Item |
| Title | 'Development of naval weapons, craft and devices in the next 10 to 15 years' |
| Date | c.1945 |
| Description | Annotations by Blackett. Unsigned but with note 'Keystone', by Blackett |
| Extent | 17pp |
| Format | Typescript with manuscript additions |
| Access status | Open |