The GPS Super Store.™ Since 1994.

United States

1-866-GPS-CITY • Live Chat

Cart (0)

Videos

Reviews

Testimonials

What's New

Rebates

Gallery

Events

GPS City Questions & Answers

Q&A Home

Newest Most Viewed Most Replies Search:

Got questions? We've got answers. By the thousands!

If you have a question about a product, be it units, mounts, software, or accessories, we'll do our best to answer it correctly and in a timely manner. All questions are answered by one of our knowledgeable technical support staff. Everyone is welcome to participate! No login required.

How Do I Ask A Question?

Go to a product's webpage, then click the 'Q&A' tab and enter your question (no login required). Your question will then appear here in the Q&As where you can check back for the answer.

GPS City Q&A » Marine GPS » Is this compatibility with Topo mapping?

Marine GPS (7 replies)

Item

Original Question

Is this compatibility with Topo mapping?

› Garmin GPSMAP 421s Sounder with Dual Frequency Transducer

Author

Reply

Joe
NWT

Original question asked on May 18, 2011, 11:24pm

Can you please advise wether or not the Garmin GPSMAP sounders are compatible with the Garmin TOPO software.

Many thanks,

GPS City Mike
Calgary, AB

Reply #1 on May 19, 2011, 7:27am

Hello Joe,

Yes the GPSMAP Sounders are compatible w/ the Garmin TOPO Map softwares.

Hope this helps!

Joe
NWT

Reply #2 on Jun 15, 2011, 11:18pm

Bought this item and mapping system and all set up fine - I am however having a bit of difficulty with the Depth Sounder / Transducer. The problem is that it does not want to work (i.e. - the depth reading only blinks) when the boat is traveling at a decent speed (more than 14 knots). Any thoughts / suggestions?

GPS City
Calgary, AB

Reply #3 on Jun 16, 2011, 11:57am

Hello Joe,

When moving does the transducer stay submerged in the water? cavitation could be causing the issue. At any speed do you get a constant depth reading? How does the depth log look? does it show data scroll across the screen? Any info will help greatly. You will also want to contact Garmin for tech assistance 1-800-800-1020

Cheers

Joe
NWT

Reply #4 on Jun 16, 2011, 12:10pm

I am pretty sure that the unit stays in the water when the boat is up on step and at speed. I have mounted it on the factory plate and the boat, a Harbercraft model, is a decent name so they should know where they are placing their transducer mounts. It does give constant and accurate readings but only when travelling below 12 knots otherwise it will simply blink the last reading that it had - stop the boat and within a short time, the reading changes and stops blinking. The log seems fine and scrolls when there is a reading, otherwise it just simply doesn't register / record while under speed. Not certain if this helps sort out the issue or not.

Look forward to hearing from you.

GPS City
Calgary, AB

Reply #5 on Jun 16, 2011, 1:19pm

Hello Joe,

Do you get any air bubbles around or under the transducer when you are at speed?

Joe
NWT

Reply #6 on Jun 16, 2011, 6:00pm

I'll have to look - I am heading out on the boat tomorrow...

GPS City
Calgary, AB

Reply #7 on Jun 20, 2011, 8:02am

Hello Joe,

If you are still having issues please contact Garmin at 1-800-800-1020. They will be able to let you know if there is a problem with the unit and or transducer.

Follow:

Learn:

Videos, Q&A, Reviews

Gallery

Buzz: