Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ THE ACCURACY OF ALTITUDE OBSERVATION AT SEA https://trid.trb.org/View/400490 Thu, 21 Jul 1994 00:00:00 GMT https://trid.trb.org/View/400490 NIGHT OBSERVATION IN AUTOMATED ASTRONOMICAL NAVIGATION https://trid.trb.org/View/401777 Thu, 21 Jul 1994 00:00:00 GMT https://trid.trb.org/View/401777 PROPER PROCEDURES FOR USE AND ADJUSTMENT OF THE SURVEY SEXTANT https://trid.trb.org/View/77826 Sat, 03 Feb 1979 00:00:00 GMT https://trid.trb.org/View/77826 MEASUREMENTS OF THE SPEED OF SHIPS USING AN AUTOMATED SNELLIUS METHOD https://trid.trb.org/View/53692 Thu, 04 Aug 1977 00:00:00 GMT https://trid.trb.org/View/53692 SEXTANT HAVING NIGHT VIEWING CAPABILITY AND DIGITAL READOUT AND PORTABLE COMPUTER SYSTEM https://trid.trb.org/View/32056 Wed, 07 Apr 1976 00:00:00 GMT https://trid.trb.org/View/32056 ADVANCES IN CELESTIAL NAVIGATION https://trid.trb.org/View/26760 Thu, 01 May 1975 00:00:00 GMT https://trid.trb.org/View/26760 DAY/NIGHT REMOTE-CONTROLLED LLLTV CAMERA-SEXTANT SYSTEM FOR GENERAL AND CELESTIAL NAVIGATION https://trid.trb.org/View/18398 Thu, 28 Feb 1974 00:00:00 GMT https://trid.trb.org/View/18398 SIGHT REDUCTION USING THE PORTABLE SEXTANT COMPUTER SYSTEM https://trid.trb.org/View/12393 Fri, 11 May 1973 00:00:00 GMT https://trid.trb.org/View/12393 A DIGITAL READ-OUT DAY AND NIGHT MARINE SEXTANT https://trid.trb.org/View/4851 Sat, 21 Apr 1973 00:00:00 GMT https://trid.trb.org/View/4851