The English had started to arm ships with uniform calibers per deck by 1666

Compared to the Dutch, it is very striking to see that the English were arming ships with uniform calibers on each deck. That was not universal, but it was extremely common. Even the Black Bull (ex-Dutch Wapen van Edam) was armed that way. She had a lower tier armed with 22-12pdr and upper tier armed with English sakers (5-1/4pdr). Her Dutch dimensions had been 120ft x 28ft x 11ft, while her English dimensions, as measured, were 86ft on the keel x 28ft-4in outside the planking x 12ft in the hold. Her intended crew at the Four Days Battle numbered 160 men.