| Motor Anti-Submarine
Boats |
| |
| BPB type, MASB 1 -
5, 22 - 39 |
| |
|
| Names |
Number |
| MASB 1 - 5 |
5 |
| MASB 22 - 39 |
18 |
| |
23 |
| |
 |
1:300 BPB type MASB 1, showing
depth charges aft
and the twin 0.303" MG's in the wings © Andrew
Arthur |
This little 60' design was put forward by BPB for a boat
capable of countering U-boats in coastal waters threatening
coastal shipping. It's depthe charges were capable of countering
a submerged U-boat, but there was no way to track such a
submaringe, and with no major gun to counter a surfaced sub, it
was a flawed concept. As such, they were converted to Air-Sea
Rescue boats, or target towers.
| Dimensions
& Displacements |
| Empty Displacement |
18 tons |
Length |
60' |
| Full Displacement |
19 tons |
Beam |
13.25' |
| Load |
1 tons |
Draught |
2.25' |
| |
|
|
|
| Propulsion &
Performance |
| 2 x Napier Sealion
12 cyl. petrol @ 1000 bhp |
| Speed |
| 25 knots |
| |
| Armament &
Complement |
| Complement |
9 |
| Armament |
|
| |
|
| |
|
| Names |
Number
Ordered |
| MASB 6 - 21 |
16 |
| |
 |
1:300 arrangement of a BPB MASB
"6" type. Depth charges are carried
along the sides aft, and two quad 0.303" Boulton
& Paul aircraft turrets
are mounter on the centreline. © Andrew Arthur |
Another BPB design. Despite being on the larger 70 foot hull
and with two powered aircraft turrets, this design too was flawed
in concept, and so they were converted to some of the first
MGB's, with a new armament.
| Dimensions
& Displacements |
| Empty Displacement |
20 tons |
Length |
70' |
| Full Displacement |
23 tons |
Beam |
12' |
| Load |
3 tons |
Draught |
4.25' |
| |
|
|
|
| Propulsion &
Performance |
| 2 x Napier Sealion
12 cyl. petrol @ 1000 bhp |
| Speed |
| 23 knots |
| |
| Armament &
Complement |
| Complement |
9 |
| Armament |
- Gun
- 2 x 4 x 0.303"
Boulton Paul MG turrets
- ASW
|