522327
105
Zoom out
Zoom in
Previous page
1/109
Next page
95
GPS & Navigation Terms:
Acquisition Time The length of time that a GPS receiver typically takes to determine a
position from at least three satellites. Humminbir 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, 18is 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 signalsbroadcast
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 advent of WAAS has largely
negated the need for the added expense of a DBR in the United States.
Distance To Go The straight-line distance between Present Position and the Destination
Waypoint. DTG and SOG (Speed Over Ground) are used to calculate Time To Go. See
Time
to Go
and Speed Over Ground.
Glossary
105


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 581i 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 581i in the language / languages: English as an attachment in your email.

The manual is 1,89 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