3200 | |
S/V Laidly returning to Fairport Harbor. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3201 | |
S/V Laidly in Fairport Harbor. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3202 | |
Interior of S/V Laidly. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3203 | |
Diver preparing to check source of shoal spot in sounding record. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3204 | |
Diver leaving S/V Laidly. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3205 | |
Inshore survey boat. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3206 | |
Inshore survey boat. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3207 | |
Del Norte navigation receiver aboard inshore survey boat. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3208 | |
Repairing transmission on inshore survey boat. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3209 | |
Del Norte navigation system shore positioning station. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3210 | |
Conducting range azimuth operations with the S/V LAIDLY. Transit surveying instrument operator reads angle to boat while Del Norte system determines range. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3211 | |
Range azimuth shore positioning station combining visual azimuth with transit electronic distance from Del Norte unit. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3212 | |
Visual station signal for use in calibrating S/V Laidly electronic navigation system with sextant. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3213 | |
Description not available. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3214 | |
Checking water level readings at Fairport Harbor Coast Guard Station. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3215 | |
Survey crew office trailers at Fairport Harbor Coast Guard Station. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3216 | |
Interior of office trailer at Fairport Harbor Coast Guard Station. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3217 | |
Fairport Harbor breakwater with Great Lakes ore carrier entering the harbor. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3218 | |
Real time plotter on S/V Laidly. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3219 | |
Inshore survey boat for use in shallow water. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3220 | |
Teletype on inshore survey boat for recording time, depth, electronic positioning information, etc. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3221 | |
Fathometer on inshore survey boat. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3222 | |
Electronics on inshore survey boat. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3223 | |
Inshore survey boat from deck of S/V LAIDLY. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3224 | |
Installing Del Norte navigation transponder on lighthouse. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3225 | |
Packing up and getting ready to leave for shore stations . |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3226 | |
Inshore survey boat. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3227 | |
S/V Laidly |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3228 | |
S/V Laidly underway. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3229 | |
Sailboats in Fairport Harbor. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3230 | |
Position check in office trailer. |
Lake Erie, Fairport Harbor, Ohio 1972 ca. |
3231 | |
Gas pipe triangulation tower similar to Bilby tower. |
1901 |
3232 | |
U. S. Lake Survey facilities at Detroit, Michigan. |
|
3233 | |
U. S. Lake Survey vessel SURVEYOR is largest vessel at the Lake Survey piers at Detroit, Michigan. Lake Survey fleet in winter quarters. |
|
3234 | |
Water level recording instrument used by the U.S. Lake Survey. |
|
3235 | |
Description not available. |
|
3236 | |
Water level recording instrument used by the U.S. Lake Survey. |
|
3237 | |
Water level house used by U.S. Lake Survey Detroit, Michigan. |
|
3238 | |
U. S. Lake Survey facilities at Detroit, Michigan. |
|
3239 | |
Water level recording instrument used by the U.S. Lake Survey. |
|
3240 | |
U.S. Lake Survey Steamer No. 1, used for harbor surveys. |
|
3241 | |
U.S. Lake Survey Steamer No. 2, used for magnetic surveys on Great Lakes. |
|
3242 | |
U.S. Lake Survey Launch Inspector used for surveys of New York state canals. |
|
3243 | |
Floating plant of U.S. Lake Survey in winter quarters at Detroit, Michigan. |
|
3244 | |
Details of some of the hardware of wire sweep apparatus used by the Lake Survey. Francis C. Shenehon(1861-1939) invented a version of the wire sweep in approximately 1901while employed by the U.S. Lake Survey. |
|
3245 | |
Lake Survey Steamer COL J. L. LUSK, used for surveys on the Great Lakes. |
|
3246 | |
Description not available. |
|
3247 | |
Description not available. |
|
3248 | |
Graham Brothers observing truck called a "dog-catcher" truck. In New Jersey on the survey line that started at Highlands in Sandy Hook area. Line ended at Absecon Inlet area. |
New Jersey, Sandy Hook area 1930 April |
3249 | |
Carson P. Buck recording on left, observer Lt. (j.g.) Wilbur Porter on left, Zimmich umbrella holder and "gun-toter" between setups. Zimmich's father was chief of the instrument division. On the Highlands to Absecon level line. |
New Jersey, Sandy Hook area 1930 April |