How Do You Share a Track With Other Sailors?

#23
We are planing our trip from Salem Ma to Nantucket using the app. There is the Cape Cod river that we can use to cut down our travel time. The app has current flow with direction and time. this will be a big help.
 
#26
Blow i am giving the following apps for Track With Other Sailors?
1-Navionics
2-Ship Finder Navigation
3-Garmin BlueChart® Mobile Navigation
4-mAIS MarineTraffic Ship Position Reporting Navigation
5-OpenSeaMap Navigation
 
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