Talk:NT Card

This info might help, an e-mail that I request to C-Map regarding any info on tehcnical documentaiton.

Dear Sir or Madam

Thank you for your enquiry regarding our cartography and the technology uponwhich it relies. I 
will try to help with your request as best I can.

The C-Card (or NT) type card is a solid state storage cartridge exclusively made for C-Map  
(now owned by Jeppesen, a Boeing company). They are re-writeable and capable of storing 
large amounts of data, as is needed in storing some of larger nautical charts in the C-Map 
catalogue (such as AF-M004, the entire Red Sea, Arab Gulf and Africa) despite the significant  
memory savings made in the use of vector charting, as against raster charting. User cards are 
available in the C-Card format in memory capacities from 128kb to 4 MB, designed to store and 
transfer user points, routes and tracks. Given that a single user point uses just 128 kb, the 
capacity to do this is extensive. C-Cards are used by the majority of major chart plotter
manufacturers and as the preferred method given their hardiness and reliability over media,
however, in C-Map's latest top-end line for the leisure market, Max Pro, they are   
not used, rather DVD or built in to the harddrive of the plotter.

I hope this helps in some way and if I can be of any 
more assistance thenplease do not hesitate to e-mail back.

Yours

Lloyd Jackman

C-Map Help Desk
US Market: www.c-map.com 
European Market: www.c-map.it

I think NT card was probably designed for "high performance militaristic" caches according to the e-mail.

--Ramu50 (talk) 20:16, 10 July 2008 (UTC)[reply]

Further to this, I should like to confirm that the card design was not for high or low performance militaristic caches and this was in no way implied in my e-mail [Lloyd Jackman, C-Map by Jeppesen] —Preceding unsigned comment added by 83.25.57.185 (talk) 18:27, 11 July 2009 (UTC)[reply]