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Jahresbericht Nr. 21/1966 
The Chart Establishment experienced a slight decrease in the sales of 
charts, amounting in 1966 to 170,114 copies. In 1965 the changes in the 
buoyage of the Scandinavian waters had led to a greater demand for charts. 
Compared with 1964, however, the sales of charts increased by 11,400 copies. 
Much time is saved in the printing of chart blocks by the method of direct 
copying from the corrected originals on to printing plates. 
In hydrographic surveying our survey vessels have run 9,400 nm of 
sounding profiles in the home waters. 6,989 nm of the south-east Greenland 
shelf, insufficiently sounded so far, were surveyed by KV "Meteor", thus 
employed for the first time in hydrographic surveying. Our wreck searching 
vessels searched 1,068 square nautical miles in the North and Baltic Seas 
for underwater obstacles and located 12 unknown wrecks. The survey and 
research vessel ".Gauss" performed eight research and trial cruises into 
the North and Baltic Seas covering a distance of 10,584 nm. A charter 
airplane was employed for aerophotogrammetrie work over the tidal lands 
off the western coast of Schleswig-Holstein serving hydrographic surveying. 
The Sailing Directions Establishment issued new editions of the follow 
ing books: Stir Brücke und Kartenhaus (for bridge and chart house); Nordsee- 
Handbuch, östlicher Teil (North Sea handbook, eastern part); Handbuch des 
Kanals, I. Teil (handbook of the Channel, Part I); Mittelmeer-Handbuch, 
II. Teil (Mediterranean handbook, Part II); Handbuch der Süd- und Ostküste 
Afrikas, I. Teil (handbook of the southern and eastern coasts of Africa, 
Part I). The German Notices to Mariners, with a weekly edition of 3,650 
pieces, delivered about 5,000 articles, notices, and notifications. For 
rationalization purposes, the German list of lights is being given a new 
form providing the data of a light in two columns on one page. 
The department Nautical Engineering could advance the development of 
the induction compass with field strength indicator. The vibrator table 
for compass tests is under construction at the technical workshop of the 
G.H.I.. Standardization of compass dimensions shall, according.to a 
resolution of the "International Organization for Standardization" (ISO), 
be restricted for the time being to a few dimensions. The stress on nautical 
instruments aboard ships was tested during a "Meteor" cruise. The different 
sorts of kerosene available on the market produce luminous intensities in 
the burners of navigation lights at the lower limit of minimum values. 
Investigations into whether an improvement in bearing accuracy can be 
achieved at the receiving station by separating the electromagnetic field 
of the radio transmitter into ground and sky waves by means of a special 
antenna positioning diagram yielded negative results.