Electronics for loading Raydist tower. Party off of NOAA Launch 1257

Erecting ARGO navigation tower. Party off of MT. MITCHELL

Erecting ARGO navigation tower. Party off of MT. MITCHELL

Erecting ARGO navigation tower. Making final adjustments - not a good job for acrophobics. Party off of MT. MITCHELL

Erecting ARGO navigation tower. Making final adjustments - not a good job for acrophobics. Party off of MT. MITCHELL

Erecting ARGO navigation tower. Making final adjustments - not a good job for acrophobics. Party off of MT. MITCHELL

Using Coast Guard light tower as base for ARGO whip antenna. Party off of PEIRCE

Hydrotrac navigation system antenna in lower Cook Inlet. Party off of PATHFINDER

ARGO shipboard electronics package. On PEIRCE

Plotting Raydist readings with Odessey protractor. Note circular arcs on boat sheet denoting range-range navigation. Launch party off of PIONEER

Raydist strip chart record used to keep track of individual navigation rates. These strip charts required continuous monitoring by a watch-stander. Used to assure navigational accuracy during hydrographic surveying operations. First tests of Raydist on SOSBEE in 1954. Used for over 40 years with various systems

ARGO strip chart record on SURVEYOR.

ARGO strip chart record on PEIRCE.

Maintaining Raydist strip chart watch.

Testing moored instrument package for GATE Project. Operations on NOAA Ship WHITING

Testing moored instrument package for GATE Project. Operations on NOAA Ship WHITING

Testing moored instrument package for GATE Project. Operations on NOAA Ship WHITING

Testing moored instrument package for GATE Project. Operations on NOAA Ship WHITING

Testing moored instrument package for GATE Project. Operations on NOAA Ship WHITING

Bringing Shoran gear up a cliff for shore camp by using strongback. Operations off of SURVEYOR

Bringing Shoran gear up a cliff for shore camp. Operations off of SURVEYOR

Geometry of first microwave navigation system tested by C&GS. Converted range readings to lines of equal angles between stations. Used for high-accuracy inshore work. After testing, determined not sufficiently accurate for large-scale surveys. Tested on SOSBEE

Microwave navigation system - shore installation on tower. Tower merely a platform and not loaded. Tested on SOSBEE

Microwave navigation system - shore installation on tower. Tower merely a platform and not loaded. A line-of-sight system -- the higher the tower, the further the reception. Tested on SOSBEE

Installing a microwave navigation system. Installing system on Georgia Coast day marker. Party off of WHITING

Erecting a 30-foot tower for a microwave transponder. Assistant Boatswain "Colonel" Sanders. Party off of WHITING

Chief Electronics Technician Slim Tittle hooking up batteries. Power source for microwave navigation system. Party off of WHITING

Carrying batteries for microwave navigation system. Party off of WHITING. Party off of WHITING

Carrying tower sections through the Spanish bayonet. Installation party for microwave navigation system. Party off of WHITING

Securing tower sections prior to erecting tower. Installation party for microwave navigation system. Party off of WHITING

Seaman Shorty Fuentes adjusts navigation transponder. Installation party for microwave navigation system. Party off of WHITING

Microwave navigation instrument setup on shore.

Microwave navigation instrument setup on dolphin.

Setting up microwave navigation instrument on lighthouse. Party off of PEIRCE

Microwave navigation instrument with attenuator for calibration. Party off of PEIRCE

Microwave navigation instrument setup on lighthouse in Delaware Bay. Party off of PEIRCE

Looking up to microwave navigation instrument setup on Delaware Bay Lighthouse. Party off of PEIRCE

Setting up microwave navigation instrument on pier at Fredericksted. Party off of PEIRCE

Mike Abbott and Skip Payne conducting range-azimuth work on "Guano Rock". Party off of FAIRWEATHER

Conducting range-azimuth hydrography from buoy in Indian River Inlet. Party off of PEIRCE

Conducting range-azimuth hydrography at Pelican Cay. All of the elements of range-azimuth. Observer tracking boat with Wild T-2 theodolite. Party off of WHITING

Conducting range-azimuth hydrography from southeast side of Hans Lollik Island. Party off of WHITING

Conducting range-azimuth hydrography in Miami. Party off of WHITING

Conducting range-azimuth hydrography on south coast of Hawaii. Party off of RAINIER

Microwave navigation instrument on east side of Penobscot Bay. Geodetic target and total station azimuth and distance instrument. Conducting geodetic operations to determine microwave navigation site. Party off of PEIRCE

Setup for calibrating microwave navigation instruments. Master unit set up across sound. Calibration crew from NOAA Ship WHITING

View of microwave navigation instrument calibration setup. Master unit set up across sound. Calibration crew from NOAA Ship WHITING

Launch readout of microwave navigation instrument distances in meters. The vessel is located the indicated distance in meters from stations #1 and #3. Readout on sounding boat from NOAA Ship PEIRCE

Diagram showing relationship of tide to marker at Poolbeg Lighthouse. Datum referred to low water April 8, 1837 for County Dublin. Note use of Mean Sea Level

Tide gauge at Knik Harbor showing range of tide. Over 30 feet of tide. Party of Eoline Hand