For comparison's sake, a flight of Mossi B Mk 16's armed only with the 4000 lb "cookie" HC bombs will not be able to sink a CV as they will only do roughly 7031 lbs in damage (3126 x .75 x 3). Keep in mind the splash damage of the HC/LC bombs is GREATER by 25%, so anything with a hardness factor of less than 2343 lbs within the blast area will be leveled. They work great on towns and factories.
I forget the exact damage that it takes to sink a CV without digging in to my files, but it is near 7800 lbs.
btw.... her are the metric bombs damage in pounds:
50 kg = 172 lbs
60 kg = 206 lbs
100 kg = 275 lbs
250 kg = 615 lbs
500 kg = 1100 lbs
800 kg = 1443 lbs
1000 kg = 2835 lbs
2000 kg = 3403 lbs
1 kg = 2.2 lbs (roughly), so a 500kg bomb is roughly the same weight/size/power of a 1000lb bomb. The 1000 lb bomb and the 500kg bombs are the only bombs with the same weight to damage ratio, they are the "control".
I encourage people to take a look at a flight of G4M armed with the 800 kg AP bomb when going after a CV, especially one that has damage. Those 3 bombs alone do 6400+ lbs of damage, pretty impressive really. The Me410 can carry 2/500 kg SAP bombs, together they do just shy of 3000lbs of damage. The B5N, D3A, SBD, Stuka, 190F-8, and a few others all carry AP or SAP bombs of sort. I highly suggest them for single OBJ's.