3300 | ![thumbnail picture](https://webarchive.library.unt.edu/web/20081006152947im_/http://www.photolib.noaa.gov/ths/theb4329.jpg) |
Appears to be Texas Tower #4 south of Woods Hole. This tower was lost on January 15, 1961, during a storm with a loss of 28 lives. Ship was probably using tower as a fixed point to calibrate electronic navigation system. |
New York Bight |
3301 | ![thumbnail picture](https://webarchive.library.unt.edu/web/20081006152947im_/http://www.photolib.noaa.gov/ths/theb4330.jpg) |
Hydrographic signal on the shores of the reservoir of Grand Coulee Dam. Used as signal for navigation by three-point sextant fix. |
Grand Coulee Dam, Columbia River, Washington 1948 |
3302 | ![thumbnail picture](https://webarchive.library.unt.edu/web/20081006152947im_/http://www.photolib.noaa.gov/ths/theb4331.jpg) |
VAM-2 Magnetometer installed in Navy R5D aircraft. L to R, , Mr. Robert Seaton of Navy Hydrographic Office, and L. Hurwitz, LCDR David Whipp, R. Gebhardt, Joel Campbell, and J. Bottum, all of the USC&GS. |
1955 July |