Hostname: page-component-848d4c4894-xfwgj Total loading time: 0 Render date: 2024-07-06T00:41:31.070Z Has data issue: false hasContentIssue false

Subsurface Navigational Hazards

Published online by Cambridge University Press:  18 January 2010

John W. Chanslor
Affiliation:
(Maritime Safety Division, U.S. Naval Oceanographic Office)

Extract

1. Introduction. Nautical charts of many areas of the world carry notations adjacent to natural marine hazards such as ‘position doubtful’, ‘existence doubtful’, ‘position approximate’ and ‘reported (date)’. In spite of the development of precision survey and navigation systems, many of these notations must continue to be carried until the positions of the hazards are accurately determined or their existence disproved.

The expanse of the oceans obviously precludes costly systematic hydrographic surveys in all areas, particularly in remote offshore areas. Although international cooperation in the exchange of hydrographic information assists in meeting modern charting requirements, the task of charting the seas may never be complete.

Type
Research Article
Copyright
Copyright © The Royal Institute of Navigation 1966

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)