MIL-PRF-89201B
IHO S-46
-
Correction of Echo Soundings
(Copies of the above publications are available from the International
Hydrographic Bureau, Monaco.)
BRITISH ADMIRALTY HYDROGRAPHIC OFFICE
NP139
-
Echo Sounding Correction Tables
(Copies of the above publication are available from the British
Admiralty Hydrographic Office, Taunton, UK.)
2.4 Order of precedence. In the event of a conflict between the text
of this document and the references cited herein, the text of this document
takes precedence. Nothing in this document, however, supersedes applicable
laws and regulations unless a specific exemption has been obtained.
3.
REQUIREMENTS
3.1 First Article. When specified (see 6.2), a sample shall be
subjected to first article inspection in accordance with 4.2.
3.2
Accuracy.
3.2.1 Horizontal Accuracy. The absolute horizontal accuracy
requirement for Harbor, Approach, Coastal and General Charts is 1.0 mm (at
chart scale) circular error (CE) to the preferred datum, at a 90% confidence
level. See 6.4.3 for definition of CE.
3.2.2
Vertical accuracy.
3.2.2.1 Topographic Accuracy.
This section is not applicable to this
specification.
3.2.2.2 Hydrographic Accuracy. The absolute vertical accuracy
requirement for depth information shown on NIMA's Harbor, Approach, Coastal
and General Charts is specified in the current edition of the IHO Special
Publication No. 44 (S-44).
3.2.3 Hydrographic data accuracy. NIMA strives to compile nautical
charts with the most accurate information available, but NIMA charts are
compiled from a variety of sources, with varying accuracies. Often the metric
accuracy (expressed as circular and linear error at a certain level of
confidence) of the hydrographic and bathymetric data is unknown, or the
information is not available to NIMA. In this case, a subjective
determination of accuracy is made, based on the survey dates, scale, and
originating agency of the source.
3.2.4 Tolerance for graticules. The intersections of the parallels and
the meridians will be within 0.1 mm (0.005 in.) of their computed positions.
3.3
Datum.
4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business