which were joined by another one “Sindbad”

[JACEK1]

Hello.


The fleet of the ship-owner consists of 11 ships, which were joined by another one “Sindbad”.



Does the above sentence mean the same as "The fleet of the ship-owner consists of 11 ships, to which another one, “Sindbad”, was added?


What do you think of that?


Thank you.

 

[jutfrank]

Approximately, but the sentences are confusing.

You use present tense consists in the first part, and past tense were and was in the second parts. Why?