| | U.S. Geological Survey Information Sheet, June 1999 (Site not responding. Last check: 2007-10-30) |
 | | Although now relatively reliable, data from these instruments are not available until the instrument is retrieved (typically 1-6 months), and damage to an instrument or electronic failure is not known until the instrument is recovered. |
 | | Limited data is being sent from ocean observing systems to shore via satellite and recently, ocean observatories (such as LEO15 offshore of New Jersey), linked to shore via subsea cable, have been established to provide real-time high-resolution observations at a fixed location. |
 | | USCG Boston Approach 'B' Buoy (click for larger image and caption) |
| woodshole.er.usgs.gov /operations/coastobs/indexv32.html (465 words) |