Apps like Marlin by NGA

Here are some great alternatives to Marlin by NGA by National Geospatial-Intelligence Agency :
Marine Insight
Marine Insight
★4.7
Seabook
Seabook
★4.3
Fulcrum GIS field data capture
Fulcrum GIS field data capture
★4.2
Primo Nautic: Vessel Tracking
Primo Nautic: Vessel Tracking
★4.6
Ship Tracker: Boat Tracker
Ship Tracker: Boat Tracker
★3.4
RipCharts
RipCharts
★4.4
Ship Tracker - Live Marine Rad
Ship Tracker - Live Marine Rad
★4.0
SafeTravel - Iceland
SafeTravel - Iceland
★3.9
Where Am I? - Locality info
Where Am I? - Locality info
★4.3
AFIS Wildfire Map
AFIS Wildfire Map
★3.4
Tides Anywhere
Tides Anywhere
★3.7
NextGIS Mobile
NextGIS Mobile
★4.6
ShipAtlas - Ship Tracker
ShipAtlas - Ship Tracker
★4.2
Mobile Locator: GPS Position
Mobile Locator: GPS Position
★3.8
Memory-Map for All
Memory-Map for All
★5.0
Myanmar 2D 3D
Myanmar 2D 3D
★4.3