Only carrier capable F. FB, NF, DB and TB groups can resize according to the first applicable condition below.

a) if only one group on the CVx, then new size is 9/10 of CV capacity.
b) if Japanese and ship type is CV or CVB and date is less than 7 months since Dec 1941, new size is 1/3 of CV capacity.
c) if Japanese and ship type is CV or CVB, new size depends on group type:
(i) type is F, new size is 0.375 times CV capacity.
(ii) type is DB, new size is 0.375 times CV capacity.
(iii) type is TB, new size is 0.25 times CV capacity.
(iv) any other type, new size is 0.13 times CV capacity.
d) if Japanese and ship type is CVL, new size depends on group type:
(i) type is F, new size is 0.6 times CV capacity.
(ii) any other type, new size is 0.4 times CV capacity.
e) if British, new size depends on group type:
(i) type is F, new size is (0.6 times CV capacity) divided by number of fighter groups on board.
(ii) if more than one fighter group present and any other type, new size is (0.4 times CV capacity) divided by number of non-fighter groups on board.
f) if Allied and ship type is CV or CVB and capacity >99, new size depends on group type:
(i) type is TB, new size is 0.132 times CV capacity.
(ii) any other type, new size is 0.28 times CV capacity.
g) if Allied and ship type is CV or CVB and year<44, new size depends on group type:
(i) type is F and date is less than 7 months since Dec 1941, new size is 0.3 times CV capacity.
(ii) type is F, new size is 0.4 times CV capacity.
(iii) type is DB and year<43, new size is 0.2 times CV capacity.
(iv) type is DB and year=43 and one DB group present, new size is 0.4 times CV capacity.
(v) type is TB and year=42, new size is 0.17 times CV capacity.
(vi) any other type, new size is 0.2 times CV capacity.
h) if Allied and ship type is CV or CVB and year>43, new size depends on group type:
(i) type is F and date is less than 31 months since Dec 1941, new size is 0.45 times CV capacity.
(ii) type is F and date is less than 37 months since Dec 1941, new size is 0.47 times CV capacity.
(iii) type is F, new size is 0.4 times CV capacity.
(iv) type is DB and date is more than 36 months since Dec 1941 and more than 3 groups present, new size is 0.17 times CV capacity.
(v) type is DB and date is more than 36 months since Dec 1941 and more than 3 groups present, new size is 0.17 times CV capacity.
(vi) type is DB and date is more than 30 months since Dec 1941 and less than 4 groups present and one DB group present, new size is 0.36 times CV capacity.
(vii) type is DB and date is less than 31 months since Dec 1941 and less than 4 groups present and one DB group present, new size is 0.38 times CV capacity.
(viii) type is TB and year=45 and more than 3 groups present, new size is 0.17 times CV capacity.
(ix) any other type, new size is 0.2 times CV capacity.
i) if Allied and ship type is CVE and date is greater than 28 months since Dec 1941, new size depends on group type:
(i) type is F , new size is 0.71 times CV capacity.
(ii) any other type, new size is 0.3 times CV capacity.
j) if Allied and ship type is CVE or CVL , new size depends on group type:
(i) type is F , new size is 0.7 times CV capacity.
(ii) any other type, new size is 0.3 times CV capacity.
k) anything else, new size is CV capacity / number of groups