Camden Phila Ferry Boats?

Anyone know how many boats and their names over the years they ran? My grandfather worked on them, but I never got to ask him much about them.
I looked at a 1946 timetable and it looks like they ran about 36 trips each weekday from Market St Wharf to Federal St. Cost was $1.32 one way, $1.60 RT. It took about 8 minutes to cross and it seems they could have done this schedule with 2, maybe 3 boats only. They ran from 3;30 AM to 11;10 PM.
The bridge built in 1926 must have reduced ferry use and I wonder what was the maximum number of boats in use at one time.
I also wonder about the capabilities of the other ferry companies that ran then.

Thanks in advance for anyone helping to answer my questions.
Lou

Here's a partial list of railroad ferry names gleaned from a couple sources,these being from the Delaware River Ferry Company.

Camden
Union
Norristown
New Jersey
Southwark
Kaighn's Point
Champion
Stephen Girard
Eagle
Rebecca Howell
Agnes
General J.S.Schultze
Pilot Boy
Minnie R. Child
Colorado
Peconic
America
City of Reading
Philadelphia
Cape May
Ocean City
Margate
Delaware
Haddon Heights
Ventnor
Chelsea
Ocean City

Leased ferries also saw service:
Gotham
Reliance
Grenville Kane
Nassau
Manadnock