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 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’.


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
08/04Wed02:58 AM15L cm
08/04Wed07:55 AM48H cm
08/04Wed02:36 PM13L cm
08/04Wed08:22 PM63H cm
08/05Thu03:43 AM13L cm
08/05Thu08:46 AM50H cm
08/05Thu03:26 PM11L cm
08/05Thu09:09 PM65H cm
08/06Fri04:24 AM10L cm
08/06Fri09:32 AM53H cm
08/06Fri04:12 PM9L cm
08/06Fri09:52 PM67H cm
08/07Sat05:04 AM8L cm
08/07Sat10:15 AM55H cm
08/07Sat04:57 PM7L cm
08/07Sat10:33 PM69H cm
08/08Sun05:42 AM5L cm
08/08Sun10:56 AM59H cm
08/08Sun05:40 PM5L cm
08/08Sun11:13 PM70H cm
08/09Mon06:20 AM3L cm
08/09Mon11:36 AM61H cm
08/09Mon06:24 PM4L cm
08/09Mon11:52 PM70H cm

Marine Wind Meteogram for Lake/Chart

For real time, interactive Marine Wind prediction, download App
Date/TimeSpeed *Dir *
08/05 Thu 06:00AM4.66176.84
08/05 Thu 09:00AM3.53159.06
08/05 Thu 12:00PM3.37172.27
08/05 Thu 03:00PM3.85181.65
08/05 Thu 06:00PM3.66244.08
08/05 Thu 09:00PM2.85270.82
08/06 Fri 12:00AM2.38319.72
08/06 Fri 03:00AM3.13349.8
08/06 Fri 06:00AM1.1137.97
08/06 Fri 09:00AM0.89183.81
08/06 Fri 12:00PM1.85236.22
08/06 Fri 03:00PM3.83249.93
08/06 Fri 06:00PM4.03262.34
08/06 Fri 09:00PM3.92272.56
08/07 Sat 12:00AM2.87266.36
08/07 Sat 03:00AM1.78275.29
08/07 Sat 06:00AM1.68260.53
08/07 Sat 09:00AM0.9454.57
08/07 Sat 12:00PM2.4978.26
08/07 Sat 03:00PM2.968.94
08/07 Sat 06:00PM1.6239.51
08/07 Sat 09:00PM1.2974.03
08/08 Sun 12:00AM4.255.53
08/08 Sun 03:00AM4.4843.14
08/08 Sun 06:00AM3.4291.44
08/08 Sun 09:00AM3.74100.72
08/08 Sun 12:00PM4.13121.09
08/08 Sun 03:00PM4.38148.78
08/08 Sun 06:00PM3.48163.15
08/08 Sun 09:00PM3.39191.46
08/09 Mon 12:00AM3.22196.72
08/09 Mon 03:00AM1.65240.05
* : UTC Timezone, Speed in meters per sec, and True Direction