Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-23T09:04:41.195Z Has data issue: false hasContentIssue false

Banded Contour Charts

Published online by Cambridge University Press:  23 November 2009

Extract

A chart is the data base to which other navigational information is related and yet has to serve ships of widely different draughts. A possible alternative providing more draught-specific information based largely on currently available hardware, would be the creation of ‘banded contour charts’ on microfilm. Produced directly from a computer data bank by a fast flying light-spot microfilm plotter, the master charts would be single frames of 35 mm microfilm mounted in cards 183 by 83 mm. A set of micro-charts would be produced covering the same sea area and differing only in that each has a different, limited band of depth contours of critical importance to ships in a limited draught range: for example, the first going from 0 to 5 metres by 1-metre intervals, the second from 3 to 8, the third from 5 to 10 and so on. All other data, including spot depths outside the contours, would be the same on all charts in the series.

Type
Forum
Copyright
Copyright © The Royal Institute of Navigation 1981

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.)