I counted we had around 70 ships when we left Spanish Town with more on the way. However this huge group soon split up. Most of us peeled off and went in small groups of 4-5 and started killing off any stragglers that tried to flee.
Overall I would say that was significant backup
First picture - Front half of the fleet moving to Fort Baai area
Second picture - Waiting for the Russian fleet to arrive so we can move out