NORTHWEST 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 NORTHWEST 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-76.18
Min Latitude36.49
Max Longitude-76.02
Max Latitude36.58
Edition Label 134
Edition Label 21
Edition Label 363
* some Stats may include nearby/connecting waterbodies
Nearby Tide Station Buchanan Creek entrance
Distance from center: 9 km
Weekly High / Low Tide Table
06/17Mon02:20 AM12.794L cm
06/17Mon07:14 AM45.295H cm
06/17Mon02:02 PM9.229L cm
06/17Mon07:46 PM61.332H cm
06/18Tue03:08 AM10.217L cm
06/18Tue08:05 AM45.749H cm
06/18Tue02:47 PM7.735L cm
06/18Tue08:32 PM64.081H cm
06/19Wed03:53 AM7.409L cm
06/19Wed08:55 AM46.968H cm
06/19Wed03:33 PM5.925L cm
06/19Wed09:17 PM66.562H cm
06/20Thu04:37 AM4.735L cm
06/20Thu09:41 AM48.695H cm
06/20Thu04:19 PM3.935L cm
06/20Thu10:01 PM68.613H cm
06/21Fri05:20 AM2.441L cm
06/21Fri10:27 AM50.675H cm
06/21Fri05:06 PM1.996L cm
06/21Fri10:47 PM70.091H cm
06/22Sat06:03 AM0.646L cm
06/22Sat11:11 AM52.705H cm
06/22Sat05:54 PM0.418L cm
06/22Sat11:32 PM70.85H cm

Marine Wind Meteogram for Lake/Chart

For real time, interactive Marine Wind prediction, download App
Date/TimeSpeed *Dir *
06/18 Tue 12:00PM2.31331.24
06/18 Tue 03:00PM3.83289.67
06/18 Tue 06:00PM4.42290.85
06/18 Tue 09:00PM5.16302.13
06/19 Wed 12:00AM3.95322.02
06/19 Wed 03:00AM3.16321.54
06/19 Wed 06:00AM2.88304.19
06/19 Wed 09:00AM3.17288.56
06/19 Wed 12:00PM2.14273.18
06/19 Wed 03:00PM4.2271.83
06/19 Wed 06:00PM4.39270.03
06/19 Wed 09:00PM4.23278.61
06/20 Thu 12:00AM3.46283.77
06/20 Thu 03:00AM3.01300.16
06/20 Thu 06:00AM2.09318.2
06/20 Thu 09:00AM1.19306.83
06/20 Thu 12:00PM1.64278.77
06/20 Thu 03:00PM3.68290.11
06/20 Thu 06:00PM4.06280.85
06/20 Thu 09:00PM4.24291.24
06/21 Fri 12:00AM3.24306.33
06/21 Fri 03:00AM3.17344.6
06/21 Fri 06:00AM2.6111.23
06/21 Fri 09:00AM1.8438.16
06/21 Fri 12:00PM1.9467.78
06/21 Fri 03:00PM1.43334.2
06/21 Fri 06:00PM5.38311.09
06/21 Fri 09:00PM5.85325.38
06/22 Sat 12:00AM5.53334.59
06/22 Sat 03:00AM4.34359.69
06/22 Sat 06:00AM3.117.99
06/22 Sat 09:00AM2.5547.7
* : UTC Timezone, Speed in meters per sec, and True Direction