If planning a journey by local small craft to long distance sailing then specs of the boat and ground clearance to account for spring tides.
Checking local tide info is fine but grounding is more a risk.
Shore depth indications for area designated only.
Buying other shipping charts in apps is not what we need.
No anchor alarms or other savvy navy stuff.
Just the favourite local area of interest or work.
Wind alerts are OK for my needs but being out in a small craft with a 50 mile range and 100 miles there and back... Local Depth and sand bars or rock scare locations and other hazards on route like divers or canoeing groups.
Wind allows us to sail but other info is needed to assist small craft.
Doing a point A to point B calculate distance but not route