Let us remind that the Gdynia water trams are two catamaran ships of Żegluga Gdańska, each of them can take over 450 passengers and 50 bicycles.  During the advance sale there will be up to 300 out of 450  tickets available for each cruise at the price of 12 PLN – full price, 6 PLN – reduced and 3 PLN – bicycle. Line 520 will shuttle between Gdynia and Hel (60 minutes). Trams will cruise everyday irrespective of the weather. The shuttle between Gdynia and Jastarnia is avalible as well.
The Gdańsk and Sopot trams shuttle everyday from 25 June until 17 September on three routes between Gdańsk (Motława Wharf beside Swan Tower – Baszta Łabądź), Sopot (pier) and Hel (Western Wharf). There are three  ships of Żegluga Gdańska servicing these routes: ‘Ewa’, ‘Smiltyne’ and ‘Marina’. The rates are as follows:  between Gdańsk and  Hel – 18 PLN,  reduced – 9 PLN (duration: 2 hours), between Hel and Sopot – 16 PLN,  reduced – 8 PLN (duration: 1,5 hours), between Gdank and New Port – 30 PLN, reduced 20 PLN, Westerplatte and New Port – 5 PLN, reduced 2 PLN, Gdank and Sobieszewo – 12 PLN, reduced 6 PLN.

Detailed information available on:
http://www.zkmgdynia.pl/images/tw_info_gb.pdf

http://www.ztm.gda.pl/ferry.html