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, Relief Shading 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
05/23Thu02:03 AM17.656L cm
05/23Thu08:47 AM84.624H cm
05/23Thu03:07 PM14.993L cm
05/23Thu09:22 PM69.402H cm
05/24Fri02:44 AM18.376L cm
05/24Fri09:20 AM85.347H cm
05/24Fri03:50 PM14.646L cm
05/24Fri10:01 PM69.133H cm
05/25Sat03:29 AM19.24L cm
05/25Sat09:58 AM85.625H cm
05/25Sat04:32 PM14.429L cm
05/25Sat10:42 PM69.507H cm
05/26Sun04:16 AM19.874L cm
05/26Sun10:39 AM85.298H cm
05/26Sun05:15 PM14.266L cm
05/26Sun11:26 PM70.595H cm
05/27Mon05:06 AM20.034L cm
05/27Mon11:26 AM84.286H cm
05/27Mon05:59 PM14.159L cm
05/28Tue12:14 AM72.262H cm
05/28Tue05:59 AM19.694L cm
05/28Tue12:18 PM82.665H cm
05/28Tue06:44 PM14.142L cm

Marine Wind Meteogram for Lake/Chart

For real time, interactive Marine Wind prediction, download App
Date/TimeSpeed *Dir *
05/24 Fri 12:00PM1.43175.78
05/24 Fri 03:00PM1.31201.44
05/24 Fri 06:00PM0.83131.46
05/24 Fri 09:00PM2.58157.82
05/25 Sat 12:00AM1.43182.35
05/25 Sat 03:00AM1.25322.13
05/25 Sat 06:00AM1.637.52
05/25 Sat 09:00AM1.29123.37
05/25 Sat 12:00PM0.85335.71
05/25 Sat 03:00PM131.26
05/25 Sat 06:00PM1.954.82
05/25 Sat 09:00PM3.19343.51
05/26 Sun 12:00AM2.18329.99
05/26 Sun 03:00AM3.09288.7
05/26 Sun 06:00AM1.87347.35
05/26 Sun 09:00AM1.4319.38
05/26 Sun 12:00PM1.3527.71
05/26 Sun 03:00PM0.940.01
05/26 Sun 06:00PM1.0423.63
05/26 Sun 09:00PM3.23316.2
05/27 Mon 12:00AM2.59352
05/27 Mon 03:00AM2.08347.19
05/27 Mon 06:00AM2.22327.13
05/27 Mon 09:00AM2.382.83
05/27 Mon 12:00PM2.38312.76
05/27 Mon 03:00PM3.7213.75
05/27 Mon 06:00PM3.0823.75
05/27 Mon 09:00PM4.1813.3
05/28 Tue 12:00AM6.5659.69
05/28 Tue 03:00AM2.7967.58
05/28 Tue 06:00AM3.3898.28
05/28 Tue 09:00AM3.33122.32
* : UTC Timezone, Speed in meters per sec, and True Direction