2. OPERATIONAL OVERVIEW
2.1.7
Overlay/NAV Tools box
The [Overlay/NAV Tools] box sets up
the following objects and consists of
the following pages.
• TT•AIS
• Echo
• Parallel index lines
• Range rings
• Predictor (predicts ship's future
movements)
• Under the keel clearance graphic
• Anchor watch
• Look-ahead
• Curved EBL
See chapter 13 and 14 for TT/AIS de-
scriptions. Refer to section 16.2 for the
radar overlay.
2.1.8
Alert box
The [Alert] box shows operational and system
alert messages, with alert ID no. and alert mes-
sage. See chapter 20.
2.1.9
Permanent warning box
The permanent warning box dis-
plays chart-related warning mes-
sages.
Click the arrow to show details.
Click the arrow again to minimize
the box.
2.1.10
EBL, VRM boxes
The EBL measures the bearing to an object, and the VRM measures the range to an
object. See section 2.9.
2-14
Minimize button
Page name
Click arrow to
show details.
Page
selection
buttons