Garmin 478GPS has charts? - SailNet Community
LinkBack Thread Tools
post #1 of 2 Old 03-10-2007 Thread Starter
Junior Member
Join Date: Aug 2001
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Garmin 478GPS has charts?

Trying to find a good GPS (nonfixed mount) and noticed the Garmin 275 and 478. The only difference I can see in the two (other than price) is the XM radio and maybe the charts that come pre-loaded. Looks like the 275 only has general marine charts... not the true detail so you would have to buy a card. However, it looks like the 478 includes the good charts that you could actually use for coastal navigation because they have enough detail... its hard to tell from the specs and pictures because they always discuss the upgraded cards (if you look at fine print on th 275 it says with optional blue chart). Anyway, trying to figure out what you get out of the box vs with upgraded chart cards. Any help would be appreciated.

Keyne is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 2 Old 03-11-2007
Telstar 28
sailingdog's Avatar
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 18 Times in 14 Posts
Rep Power: 16
What is the Garmin 275... There isn't such a model AFAIK... The 276 is an older model and uses the BlueChart software for marine charts... and the charts have to be unlocked area, by area, and downloaded into the unit using a PC. Areas not downloaded only have general marine data.

The 378 and 478, are two generations newer, since the 276 was followed by the 376, which was the first unit to support the XM radio weather.

From Garmin's website:

Preloaded and Portable
From curbside to dockside, the GPSMAP 478 has you covered — no downloads or computer required. Its built-in marine charts utilize the latest BlueChart® g2 technology and feature coverage for all U.S. coastal areas, including Alaska and Hawaii. Our g2 mapping technology offers a smoother, more fluid presentation on your screen.
The 378 has the inland data preloaded.

However, all three units, the 276, 378 & 478 can also accept BlueChart data that is unlocked from the CD and downloaded on to their data cards. You do need a proprietary Garmin Data Card programmer to do this... I'm not sure how good the 276's compatibility with the newer BlueChart G2 data formats is though.

Remember, that the charts pre-loaded on to the ROM in the 378 and 478 are from a fixed point in time and do not include any NTMs after the date the data was fixed, so may not be completely accurate to the areas you are sailing in.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

sailingdog is offline  
Quote Quick Reply Share with Facebook

Quick Reply

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Advanced Electronic Charting Jim Sexton Gear and Maintenance Articles 0 12-01-2004 07:00 PM
Choosing Charts Paul & Sheryl Shard Seamanship Articles 0 04-30-2003 08:00 PM
Electronic Charts 101 Jim Sexton Seamanship Articles 0 10-29-1999 08:00 PM
Electronic Charts 101 Jim Sexton Gear and Maintenance Articles 0 10-29-1999 08:00 PM
Electronic Charts 101 Jim Sexton Cruising Articles 0 10-29-1999 08:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome