S/V Laidly returning to Fairport Harbor.

S/V Laidly in Fairport Harbor.

Interior of S/V Laidly.

Diver preparing to check source of shoal spot in sounding record.

Diver leaving S/V Laidly.

Inshore survey boat.

Inshore survey boat.

Del Norte navigation receiver aboard inshore survey boat.

Repairing transmission on inshore survey boat.

Del Norte navigation system shore positioning station.

Conducting range azimuth operations with the S/V LAIDLY. Transit surveying instrument operator reads angle to boat while Del Norte system determines range.

Range azimuth shore positioning station combining visual azimuth with transit electronic distance from Del Norte unit.

Visual station signal for use in calibrating S/V Laidly electronic navigation system with sextant.

Description not available.

Checking water level readings at Fairport Harbor Coast Guard Station.

Survey crew office trailers at Fairport Harbor Coast Guard Station.

Interior of office trailer at Fairport Harbor Coast Guard Station.

Fairport Harbor breakwater with Great Lakes ore carrier entering the harbor.

Real time plotter on S/V Laidly.

Inshore survey boat for use in shallow water.

Teletype on inshore survey boat for recording time, depth, electronic positioning information, etc.

Fathometer on inshore survey boat.

Electronics on inshore survey boat.

Inshore survey boat from deck of S/V LAIDLY.

Installing Del Norte navigation transponder on lighthouse.

Packing up and getting ready to leave for shore stations .

Inshore survey boat.

S/V Laidly

S/V Laidly underway.

Sailboats in Fairport Harbor.

Position check in office trailer.

Gas pipe triangulation tower similar to Bilby tower.

U. S. Lake Survey facilities at Detroit, Michigan.

U. S. Lake Survey vessel SURVEYOR is largest vessel at the Lake Survey piers at Detroit, Michigan. Lake Survey fleet in winter quarters.

Water level recording instrument used by the U.S. Lake Survey.

Description not available.

Water level recording instrument used by the U.S. Lake Survey.

Water level house used by U.S. Lake Survey Detroit, Michigan.

U. S. Lake Survey facilities at Detroit, Michigan.

Water level recording instrument used by the U.S. Lake Survey.

U.S. Lake Survey Steamer No. 1, used for harbor surveys.

U.S. Lake Survey Steamer No. 2, used for magnetic surveys on Great Lakes.

U.S. Lake Survey Launch Inspector used for surveys of New York state canals.

Floating plant of U.S. Lake Survey in winter quarters at Detroit, Michigan.

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.

Lake Survey Steamer COL J. L. LUSK, used for surveys on the Great Lakes.

Description not available.

Description not available.

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.

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.