navtronic 1701t

Date of introduction:  1979 Display technology:  LED-stick
New price:  $199.50 (1980) Display size:  12
Size:  5.9" x 3.2" x 1.5"
 150 x 81 x 39 mm3
Weight:  8.0 ounces, 227 grams Serial No:  3852
Batteries:  3*AA NiCd  Date of manufacture:  year 1979
AC-Adapter:   Origin of manufacture:  USA
Precision:  8 Integrated circuits:  MM5782, MM57129,  MM5368, ITC1200, ITC1210, ITC4800, 2*ITC5028
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 4.3 MByte)

1701t_1.jpg (154138 Byte)The navtronic 1701t is based on the earlier navtronic 16 but added a physical protection to the 14 LED-indicators on the keyboard panel.

The 1701t is one of four very similar flight computers:

navtronic 1701: Basic navigation calculator
navtronic 1701t: Added TIMER function (START, STOP keys)
navtronic 1701r: RNAV functions (R1, R2, D1, D2 LED-indicators)
navtronic 1701tr: TIMER and RNAV functions

If we trace back in the history of electronic flight computers we discover: The Commodore N-60, the Heathkit OCW-1401 and the navtronic 16 resp. navtronic 1701 models. All were introduced around the year 1978, two years before the Jeppesen Sanderson avstar based on a Texas Instruments TI-35 appeared.

In 1983 with the Navigator and Explorer enhanced flight computers were introduced.

There are some rumors that the "1701 series" got it designations as a nod to Star Trek, the U.S.S. Enterprise is #1701. The 1701 itself comes from "FAA registry of a Waco biplane, owned by TOS chief designer Matt Jefferies".

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If you have additions to the above article please email:

Joerg Woerner, February 3, 2002. No reprints without written permission.