I have Build 55 on my iphone. I like the Vector Charts, but find that I have odd scale problems with the vector charts downloaded for use offline. In various areas, small shale or large scale charts don’t show up. For example, there are 1:25000 ENCs covering Sucia Island, but I see nothing larger than about 1:80000. In other areas like Anacortes, 1:25000 shows up fine, but nothing between 1:40000 and 1:80000. At scales smaller than 1:679000, everything north of Smith Island disappears (reverts to the cartoon background chart).
Also, is there a way to use the “charts here” feature of PC Coastal Explorer?