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
02/04Sat01:04 AM-8.595L cm
02/04Sat07:31 AM52.565H cm
02/04Sat12:59 PM-6.245L cm
02/04Sat07:38 PM57.646H cm
02/05Sun01:44 AM-8.929L cm
02/05Sun08:13 AM53.74H cm
02/05Sun01:42 PM-7.123L cm
02/05Sun08:19 PM57.68H cm
02/06Mon02:21 AM-8.599L cm
02/06Mon08:50 AM54.454H cm
02/06Mon02:23 PM-7.692L cm
02/06Mon08:56 PM57.589H cm
02/07Tue02:55 AM-7.906L cm
02/07Tue09:24 AM54.96H cm
02/07Tue03:01 PM-7.9L cm
02/07Tue09:32 PM57.478H cm
02/08Wed03:27 AM-7.233L cm
02/08Wed09:54 AM55.697H cm
02/08Wed03:38 PM-7.745L cm
02/08Wed10:07 PM57.375H cm
02/09Thu03:56 AM-6.874L cm
02/09Thu10:24 AM57.009H cm
02/09Thu04:14 PM-7.214L cm
02/09Thu10:42 PM57.157H cm

Marine Wind Meteogram for Lake/Chart

For real time, interactive Marine Wind prediction, download App
Date/TimeSpeed *Dir *
02/05 Sun 12:00PM3.1214.42
02/05 Sun 03:00PM3.0524.41
02/05 Sun 06:00PM3.9335.28
02/05 Sun 09:00PM4.3121.79
02/06 Mon 12:00AM4.5919.35
02/06 Mon 03:00AM3.2331.34
02/06 Mon 06:00AM1.9471
02/06 Mon 09:00AM3.89125.64
02/06 Mon 12:00PM3.54132.25
02/06 Mon 03:00PM5.23142.52
02/06 Mon 06:00PM6.08149.14
02/06 Mon 09:00PM4.63153.99
02/07 Tue 12:00AM3.08139.2
02/07 Tue 03:00AM2.13161.43
02/07 Tue 06:00AM1.36166.25
02/07 Tue 09:00AM0.97247.31
02/07 Tue 12:00PM1.61338.08
02/07 Tue 03:00PM2.790.89
02/07 Tue 06:00PM4.4112.38
02/07 Tue 09:00PM4.8511.39
02/08 Wed 12:00AM4.4322.12
02/08 Wed 03:00AM3.346.49
02/08 Wed 06:00AM2.0648.06
02/08 Wed 09:00AM1.8260.27
02/08 Wed 12:00PM1.255.41
02/08 Wed 03:00PM0.6794.09
02/08 Wed 06:00PM1.03127.37
02/08 Wed 09:00PM0.88226.97
02/09 Thu 12:00AM1.74288.42
02/09 Thu 03:00AM2.4277.12
02/09 Thu 06:00AM2.56289.81
02/09 Thu 09:00AM2.45308.63
* : UTC Timezone, Speed in meters per sec, and True Direction