522349

Humminbird 998C SI Manual

156
Zoom out
Zoom in
Previous page
1/160
Next page
146
Glossary Sonar Terms GPS & Navigation Terms
provide a very good 2 1/2 inches of target separation in shallower than 100 feet of
depth. Target separation decreases as depth increases due to the need for longer Pulse
Width to achieve greater depth. See Pulse Width.
Thermoclines Water layer(s) of distinctly different temperatures that create a sonar
reflection due to the density of the differing water temperatures. Typically a
thermocline will appear as a continuous band across the display at some distance
above the bottom contour. Thermoclines are of interest to anglers because fish will
suspend above or below the thermocline as they seek the optimum temperature and
oxygen levels.
Time Variable Gain (TVG) A processing step applied to the sonar return to
“normalize“ the data so that objects of equal size (i.e. fish) appear to be the same size,
even if they are separated by a good distance.
Transducer The transducer is part of the sonar system, which mounts on the boat
and is in contact with the water, that converts the electrical energy from the
transmitter into sound energy, and that forms the sonar beam in turn. Internally, the
transducer consists of one or more piezo electric disks that expand by very minute
amounts to create the sound wave. This element also works in reverse, converting the
returned sound energy back into an electrical signal that the receiver interprets. See
SONAR.
Zoom A feature that focuses on a smaller area of the bottom to provide enhanced
resolution. With enhanced resolution, the angler can more easily see fish hanging in
structure or multiple fish hanging close together.
Zoom, Bottom Lock Bottom Lock Zoom is a feature that focuses on a smaller area
just above the bottom to provide enhanced resolution. Unlike regular zoom, it
continuously graphs the bottom at a constant point on the display regardless of
changes in depth. This “flattens“ out the bottom contour, but is effective at showing
fish on or near the bottom, and is preferred by many saltwater anglers.
Acquisition Time The length of time that a GPS receiver typically takes to determine
a position from at least three satellites. Humminbird® GPS receivers provide very fast
acquisition times (under one minute), permitting users to get out on the water faster.
Altitude The height measurement above sea level. Altitude is a measurement that
can be provided by GPS.
Bearing (BRG) The direction to a destination waypoint measured in degrees from
North (i.e. 321°, where 000° is North, 090° East, 180° is South, 270° is West).
Chartplotter A navigation device that shows Present Position on a Map, along with
Tracks, Waypoints, and Routes. All Chartplotters are also considered Trackplotters.
Cold Start The procedure that a GPS receiver must perform when it does not have
historical information regarding its current location. This procedure typically lasts for
several minutes, and may be experienced upon first power up of the receiver, or if the
receiver has been moved a great distance.
Course Over Ground (COG) The current direction the boat is traveling measured in
degrees from North (i.e. 321°, where 000° is North, 090° East, 180° is South, 270° is
West). When the Course Over Ground is equal to Bearing, the boat is said to be “On
Course” and will arrive at the destination in the most efficient manner. COG is often
confused with Heading. See
Heading.
Cross Track Error (XTE) The straight-line distance of the boat from the intended
Track. XTE measures how far the boat is off course and also triggers the Off Course
Alarm. See
Track.
Differential GPS (DGPS) A system used to improve the position accuracy of the
Department of Defense GPS through the use of secondary “correction signals”
broadcast from ground stations around the coastal United States and on some inland
waterways. These correction signals are provided by the USCG and received by an
auxiliary Differential Beacon Receiver (DBR) that connects to the GPS receiver. The
Glossary - Sonar Terms, GPS & Navigation Terms
… 156 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Humminbird 998C SI at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Humminbird 998C SI in the language / languages: English as an attachment in your email.

The manual is 12,13 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info