Multiply Warhead by Torpedo Spread for Offense Value, then consult for Space and Minimum Size
Warhead
Mk I: 1
Mk II: 1
Mk III: 2
Mk IV: 2
Mk V: 3
Mk VI: 3
Mk VII: 4
Mk VIII: 4
Mk IX: 5
Mk X: 6
Mk XI: 7
Mk XII: 8
Spread
1: x1
2: x1.25
3: x1.33
4: x1.33
5: x1.45
6: x1.5
7: x1.66
8: x1.75
9: x1.88
10: x2
11: x2.25
12: x2.5
13: x2.66
14: x2.75
15: x3
16: x3
17: x3.25
18: x3.5
19: x3.75
20: x4
Space
1 per 4 Warhead, 1 per 2 Spread
Minimum Size: for Mk I-IV, 3, for Mk V-VIII, 4, for Mk IX+, 5