Since Snapper season is coming soon I took the hard work of creating a custom map for the areas of :
Port Phillip Bay, including all piers and the Yarra River entrance
Western Port including all markers
Off shore area south of both ports.
The data was generated from a Garmin Bluechart map.
All up over 15GB before I was able to join the single tiles.
Known problems and limitations:
I did my best to ...