User Guide

Narrowband Waterfall Display: The Narrowband Waterfall display separates a signal from the
bearing selected in the Narrowband Search Display into discrete frequencies.The horizontal axis
represents the range of frequencies and the vertical axis represents time in seconds.The frequency
range is adjustable using the frequency scale dial as described below.Vertical lines represent
specific frequencies in the sound signal emitted by the selected contact.Together these lines
represent that contact’s sonar signature or profile.
NOTE: Straight lines indicate a consistent signal. Curved or wavy vertical lines represent distortions
in the signal.
Frequency Scale: Use this dial to adjust the frequency scale to be used in the waterfall display.
• Click the desired number to switch to that frequency range in the waterfall display.The dial
moves to indicate the frequency selected.
Frequency Window: Displays the precise frequency of the selected signal.
• To select a signal, click the desired line in the Narrowband Waterfall display.The cursor moves to
that location in the horizontal frequency indicator.
Designate Target Button: Assigns a designation to a contact.This alphanumeric reference is used
to track, identify and target contacts.A tracker is assigned to the designated narrowband contact.
To designate a contact and assign a tracker:
1. Click one of the vertical frequency lines in the Narrowband Waterfall Display.The vertical cursor
appears on the bearing indicator at the location of the line.The cursor can also be dragged.
2. Click DESIGNATE TARGET .A letter appears on the bearing indicator, and an alphanumeric tag
appears in the Track Identification window. Tracking data is sent automatically to TMA.Assigning
a tracker here may unassign a tracker from a contact in broadband if all trackers are currently
assigned.
NOTE: If the signal is weak you may have to click more than once to designate the contact and
assign the tracker.You cannot assign a tracker while the game is paused.
Ship Classification Window: This window displays the sound signature of the class or weapon
named in the Classification field. Use the Profile Selector to cycle through the available signatures.
Profile Selector: The ship’s computer compares the sonar signature in the Narrowband Waterfall
display against those in its sound profile database. Only those signatures that are similar to that of
the selected contact are presented for review.
• Click
PREV/NEXT to view the signature profiles for all ships or weapons that are similar to the
profile of the selected contact.
Cursor Position: This field displays the precise bearing of the cursor on the Narrowband Search
Display.
• To read the exact bearing of a contact, click the contact spike or click the horizontal Bearing
Indicator on the Narrowband Search Display and drag the cursor to the desired position.
Track ID: The alphanumeric Track ID, also called Contact ID, displays in the Track Identification
window when a tracker is designated in the Waterfall Display.
North Center/South Center: Toggle to change the orientation of the Narrowband Search display.
• Select North Centered to place the bearing 000 at the center of the Narrowband Search Display.
• Select South Centered to place the bearing 180 at the center of the Narrowband Search Display
Narrowband Search Display: Signals from the selected array display in an A-scan format on the
Narrowband Search Display.A contact’s signal displays as a spike at the bearing where it is
detected.The height of the spike represents signal strength. High peaks indicate strong signal
strength.
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