Creating a channel – Triton TritonNav User Manual

Page 33

2004.06.28

CHAPTER 1: Using DelphNav™ (Survey Control Panel)

Using Delph Nav

Making or Using a Survey Plan

Creating a Channel

The purpose behind creating a channel is to provide a reference surface to which a

DTM of the seafloor can be compared. This tool also sets up survey lines along which the
vessel can be navigated to acquire profile data across the designed channel.

A channel-design file contains two basic sets of line objects: length-wise borders (one for
each “side” of the channel) and a series of transverse lines (cross sections). These line
objects may be added to the DelphNav window by drawing them as lines, by inserting
coordinates manually in a spreadsheet, or by importing an ASCII file of coordinates. The
channel-design tool will lead you through this process as follows:

To create a channel design

Click the

Create a channel

button (icon shown to the right).

The system displays the Channel design procedure dialog box (Figure 15),
where you can import an existing channel or create a new one. The Chan-
nel design procedure dialog box first asks you to

Create border line No 1

(either draw the line, insert manually, or import from an ASCII file). After you create
the first border, the system shows

Create border line No 2

in blue text, and Create

border line No 1 displays in black text. Specify the second channel border at this
stage.