Hello, I am using Garmin GPSmap 60Cx, the waypoints and track data need to be download from it to my laptop, how to download data by usb port(serial port to usb compatible cable available)? thank you!

From the saved data when you backed it up on the computer. Use Garmin Express to transfer.

How to Backup User Data from GPS 72/76 or GPSMAP 76/76S

https://support.garmin.com > en-CA
It is recommended to occasionally back up the user data on your GPS 72/76 or GPSMAP 76/76S. User data includes waypoints, routes, tracks, and geocaches.

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  Transfer User Data From MapSource to a GPS 72/72H/76 or ...

  https://support.garmin.com > en-CA
  To transfer user data, such as waypoints, routes, and tracks from the MapSource program to these devices, some additional equipment will be required.
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  Manually Creating Waypoints on GPS 72/76 or GPSMAP 60 ...

  https://support.garmin.com > en-CA
  Press and hold Enter · Wait for the New Waypoint screen · Release Enter · Highlight the Coordinates field · Press Enter · Adjust the coordinates as desired with the ...
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  Backing Up Userdata (Waypoints, Routes, and Tracks) From a ...

  https://support.garmin.com > en-CA
  Before updating device software, it is recommended that you back up user data like waypoints, routes, and tracks. This should be done at regular intervals ...

f a device is locking up and has a long noise or beep when powering down, this is due to hidden data being transferred to the microSD data card. These hidden files and folders are being created by the computer and sent to the data card in addition to the maps, waypoints, routes, tracks and pictures that were selected. The following GPS units could experience this issue.

• eTrex Legend Cx
• eTrex Legend HCx
• eTrex Venture Cx
• eTrex Vista Cx
• eTrex Vista HCx
• GPSMAP 60Cx
• GPSMAP 60CSx
• GPSMAP 76Cx
• GPSMAP 76CSx
• Rino 520HCx
• Rino 530HCx

To prevent this issue when the device is shutting down delete these extra unused or hidden files and folders from the data card. Examples of these folders are: .Trashes and .Spotlight-V100 folders. Since the Mac OS adds hidden files and folders to mounted removable drive volumes this process cannot be done on a Mac and will need to be done after every time the data card is mounted as a volume on a Mac.
To delete these folders the device will have to be placed into USB Mass Storage mode. To do this:

1. Connect the device to the computer using the USB cable
2. Go to the Main Menu
3. Select Setup
4. Select Interface
5. Select USB Mass Storage Mode

The device is now in USB Mass Storage Mode. At this time a window should open on the computer desktop displaying Removable Disk at the top. The Garmin folder will be displayed. Open the Garmin folder.
Do NOT delete the the following files:

• gmapsupp.img
• gmapsupp.unl
• gmapsupp.gma

These files contain supplemental mapping. If delete will cause the mapping to be erased or unviewable.
If there are other folders or files on the data card, delete these. Some of these files or folders may be hidden and therefore will need to be unhidden*. Once you have done so, please disconnect the device from the computer and power it up.
*Note: To Display a file folder that is hidden:

1. Select the Tools option on the window that appears on the computer when the device is in USB Mass Storage Mode
2. Select Folder Options
3. Select View
4. Open the Files and Folders folder
5. Open the Hidden Files and Folders folder
6. Select Show hidden files and folder
7. Select Apply
8. Select OK

Once all of the hidden files and folders have been removed from the microSD Card the unit will not

Hello,

The 6 pin DIN plug found on the GPSMAP 421s data/power cable (Garmin part number 010-10918-00) is used for the sonar input.

Data transfer from the GPSMAP 421s is easily transferred by memory card.
Information about data transfer on the 421s is at about 50 seconds into this video.
http://www.youtube.com/gpscity#p/search/6/8ddIgvCAUmI

Real time NMEA data can be transferred using Garmin part number 010-10918-00 wired to a DB-9 serial connector (Instructions are on the cable).

It then can be adapted to USB using a serial to USB adapter.
http://www.gpscity.com/gilsson-serial-to-usb-port-4in-adapter-for-pc-and-mac.html

I'd pull the microSD and see if it boots.

If so, reseat the microSD and see if it boots. If so, good. If not, try reformatting and loading the data back on.

Every waypoint in the track has date/time, altitude and position. Second and subsequent waypoints will enable calculation and display of leg length, time, speed and direction between each par of points. The track can be displayed in 3D; in Google Earth for example. As far as I know there is no way to change the interval.

The topo maps are low in the map hierarchy. If another mapset is loaded at the same time and is also checked it will likely "cover" topo. I think the Recreation maps are the only one's lower in the hierarchy.

Sorry, no. Report serial number and internal ID number(if known) to Garmin and the Police. If a map is ever unlocked for it or it comes in for repair at least Garmin will know.

sounds you do not have appropriate usb driver so find download and install usb driver from following website:
http://www.usb-drivers.com/
chose your compute product to make sure about USB driver.

Enter like this...

12 S 0415660 3812882

This point is south of I-17 near Humbolt AZ

Hmmm..

Make sure your using a USB cable, specifically a USB cable with a mini connector on the end. Specifically, a USB cable with the second one from the left in this picture:

http://en.wikipedia.org/wiki/Image:USB_types_2.jpg

If you are using the USB port, you should have no need for setting COM ports.

Another technique you can use (which I just figured out today) was to place the Garmin Unit in "USB Mass Storage Mode". This allows you to offload saved tracks, but I don't think you can download waypoints or other things that the WayPoint Manager allows.

You can access this option via the Garmin Unit

Goto: "Main Menu" -> "Setup" -> "Interface". Press Down to get to the button "USB Mass Storage". Plug in that USB Mini cord, and you have a thumb drive!

Good Luck!