I propose that 数そう be changed to 数艘. It wasn't clear to me at first that そう was a counter.
@bunbuku
Could I hear your thoughts on this one?
@RobinS
It's clear to me そう in 数そう is a counter, but I think it's better to use 艘 for Japanese language learners.
@JimBreen
I've changed 数そう into 数艘.
Thanks.