Bronze triangulation mark. These marks are found throughout the United States and its territories. Triangulation marks have known latitudes, longitudes, and plane coordinates

Base line end point monument.

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER. Circular reel contains invar measuring tape

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER. Beginning of traverse segment from mark below Bilby Tower

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Traverse work on Florida's West Coast. Traverse crew off of HYDROGRAPHER

Observing stand with signal light and batteries

161 tons of high explosives going up at Dugway Proving Ground. Surveying before and after for crustal deformation

One dog I didn't try to pet. Drying fish, fish nets, and an underutilized husky

Wiredrag boat MARINDIN. Wiredrag party of Otis Swainson

Wiredrag boat RODGERS. Wiredrag party of Otis Swainson

Wiredrag boat underway.

Signal building and white-wash party. Not much freeboard on that boat

Small skiff inspecting sea caves. Skiff from the PIONEER

Shallow water soundings being located by stadia. A non-electronic means of range-azimuth navigation. Boat operating with Lake Survey

EXPLORER Wire Drag Tender No. 1.

Hydro survey in the St. Johns River. Combined operations party of Hubert A. Paton

Survey launch leaving the PIONEER for a day's work. Looks like nasty working conditions today

Sounding boat off the LYDONIA. Surveying potential bases in the Caribbean

EXPLORER launch equipped with Shoran antenna.

Mural on wall of Coast Survey offices in Manila.

Coast Survey offices in Manila at Engineer Island. Offices from 1936 to the beginning of World War II

List of Directors of the Philippine Bureau of Coast and Geodetic Survey.

Triangulation diagram showing near completion of triangulation of Philippines. Diagram produced in 1941

H. W. Rhodes.

George L. Anderson.

Roland D. Horne.

Philip C. Doran.

Fred Peacock on the MARINDUQUE.

Ken Crosby on the MARINDUQUE.

Otis Swainson on the PATHFINDER.

L to R, ?, George L. Anderson, Chief Conover, Cornelius D. Meaney.

Paul C. Whitney on the right. On the MARINDUQUE

Golf at the Intramuros. George L. Anderson is the duffer

Golf at the "Zambo" Country Club. L to R - caddy, George L. Anderson, caddy, H. C. Warwick. Off the MARINDUQUE

The "Club" at Sandakan. Unidentified PATHFINDER personnel and locals. After a run down to Sandakan for coal

The "Club" at Cebu.

William M. Scaife trying his hand at surfing. A stop at Honolulu on the way out to the Philippines

Wives, children, and pets accompanied the ship's in the early days. On the stern of the MARINDUQUE