POTOMAC RIVER EXTENSION (Marine Chart : US12285_P656)

POTOMAC RIVER EXTENSION marine chart is available as part of iBoating : USA Marine & Fishing App(now supported on multiple platforms including Android, iPhone/iPad, MacBook, and Windows(tablet and phone)/PC based chartplotter.).  

 When you purchase our Nautical Charts App,  you get all the great marine chart app features like fishing spots, along with POTOMAC RIVER EXTENSION marine chart. The Marine Navigation App provides advanced features of a Marine Chartplotter including adjusting water level offset and custom depth shading. Fishing spots and depth contours layers are available in most Lake maps. Nautical navigation features include advanced instrumentation to gather wind speed direction, water temperature, water depth, and accurate GPS with AIS receivers(using NMEA over TCP/UDP). Autopilot support can be enabled during ‘Goto WayPoint’ and ‘Route Assistance’. Now Automatic Slip to Slip Boat routing based Boat's Draft (draught) is available for water mapped by this chart.


Have more questions about the Nautical Chart App? Ask us.



Min Longitude-77.12
Min Latitude38.89
Max Longitude-77.06
Max Latitude38.94
Edition Label 141
Edition Label 21
Edition Label 368
* some Stats may include nearby/connecting waterbodies
Nearby Tide Station Marshall Hall, Md.
Distance from center: 6 km
Weekly High / Low Tide Table
07/01Fri03:50 AM19.182L cm
07/01Fri10:22 AM80.257H cm
07/01Fri04:42 PM12.924L cm
07/01Fri11:10 PM70.145H cm
07/02Sat04:30 AM19.61L cm
07/02Sat10:58 AM79.069H cm
07/02Sat05:15 PM13.77L cm
07/02Sat11:45 PM70.702H cm
07/03Sun05:10 AM19.578L cm
07/03Sun11:36 AM78.075H cm
07/03Sun05:46 PM14.253L cm
07/04Mon12:18 AM71.956H cm
07/04Mon05:51 AM19.306L cm
07/04Mon12:17 PM77.125H cm
07/04Mon06:18 PM14.316L cm
07/05Tue12:54 AM73.795H cm
07/05Tue06:35 AM19.108L cm
07/05Tue01:02 PM75.975H cm
07/05Tue06:53 PM14.1L cm
07/06Wed01:36 AM75.931H cm
07/06Wed07:22 AM19.219L cm
07/06Wed01:52 PM74.456H cm
07/06Wed07:34 PM13.825L cm

Marine Wind Meteogram for Lake/Chart

For real time, interactive Marine Wind prediction, download App
Date/TimeSpeed *Dir *
07/02 Sat 12:00AM3.07230.15
07/02 Sat 03:00AM2.2313.3
07/02 Sat 06:00AM3.2425.46
07/02 Sat 09:00AM2.8236.17
07/02 Sat 12:00PM3.1752.91
07/02 Sat 03:00PM2.758.59
07/02 Sat 06:00PM2.64120.31
07/02 Sat 09:00PM5.3971.92
07/03 Sun 12:00AM0.93263.12
07/03 Sun 03:00AM1.4242.52
07/03 Sun 06:00AM1.5970.66
07/03 Sun 09:00AM1.44154.85
07/03 Sun 12:00PM2.39185.95
07/03 Sun 03:00PM2.6189.83
07/03 Sun 06:00PM1.44165.76
07/03 Sun 09:00PM2.73157.61
07/04 Mon 12:00AM0.85171.18
07/04 Mon 03:00AM1.54339.45
07/04 Mon 06:00AM1.14103.54
07/04 Mon 09:00AM1.68218.62
07/04 Mon 12:00PM2.39265.87
07/04 Mon 03:00PM1.8307.23
07/04 Mon 06:00PM2.11340.21
07/04 Mon 09:00PM1.71322.01
07/05 Tue 12:00AM3.02319.98
07/05 Tue 03:00AM2.38344.23
07/05 Tue 06:00AM2.699.53
07/05 Tue 09:00AM3.0116.54
07/05 Tue 12:00PM3.6831.03
07/05 Tue 03:00PM4.3939.22
07/05 Tue 06:00PM3.5471.87
07/05 Tue 09:00PM4.729.4
* : UTC Timezone, Speed in meters per sec, and True Direction