Helwig F. Van Der Grinten
Below are just a few of the publications I wrote.
The Accuracy of Celestial Fixes as Compared to NAVSAT Positions
Navigation Journal of the Institute of Navigation, Vol 22, No2, Summer 1975
Notes on Shiphandling
Finding Faults in Cruise Ship Grounding Professional Mariner
Navy Can't Bar Cupid from Ships
Dallas Morning News
Is your anchor dragging?
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