6. RASTER (ARCS) CHARTS
6-2
Edition Date: Date when the chart was issued.
Update Date: Issue date of Update CD-ROM used to update the system
Latest NM: Date of the latest Notice to Mariners included in the chart.
Compilation Scale: The scale of the original paper chart is shown here.
Projection: Projection of current chart.
Horizontal Datum: Horizontal datum used with current chart.
WGS 84 Shift: Datum shift between local datum and WGS-84 datum is known (=De-
fined), unknown, operator defined (=Undefined) or shift is known only some parts of
chart (=Partially defined).
Sounding Datum: Datum used to create sounding data.
Height Datum: Vertical datum for objects located above sea.
Units of Depth: Unit of depth used with current chart.
Units of Height: Unit of measurement used to measure height of objects above sea
level.
[T&P Notice], [Details] and [Warnings] buttons: See the descriptions below.
T&P notice
T&P Notices are also known as Temporary and Preliminary Notices to Mariners and
they provide chart information that does not warrant permanent chart correction. To
show the T&P Notices, click the [T&P Notice] button on the [Chart Legend] dialog box.
Details
Click the [Details] button on the [Chart Legend] dialog box to show detailed information
about current chart.
Panels: Selects desired inset (Panel) from the combo box. This works in conjunction
with [Notes].
Notes: Select desired Notes from drop-down list then click the [Show Notes] button to
display the Notes.
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