The calculator casing here is date coded mid 1978. Main integrated circuits - Texas Instruments TMC0501 and TMC0583. Scientific programmable and Navigation functions.
The Tamaya NC-77 appears to have been manufactured by Sharp - the casing closely resembles that of the Sharp EL-8018.ĭistinctive features: General purpose programmable calculator fitted with a Navigation Module. Which was introduced in 1981 and is still in production. It is beaten by the Hewlett Packard 12C financial calculator Production over the the 14 years of 1978 to 1991 is probably a record length of time for any electronic calculator of the 1970s. The fitted wooden case is evidence of the respect which Tamaya had of its intruments. This is also a very specialised calculator using dedicated integrated circuits. If this is too troublesome you can buy the latest model the NC-2100G. A table to print out gives all the necessary conversions. By entering theĭate as the 99th day of the 99th month of 1999 !!! it is possible to use it up to June 23 2007.
#Celestial navigation calculator how to
The website also gives details of how to use the calculator into the year 2000 and beyond. It has a website which gives the above production dates. Tamaya is a well known manufacturer of navigation instruments. Integrated circuits - Surface mounted, types SC38664 and SC38665, here date coded early 1978. Tamaya NC-77 Digital Navigation Computer.ĭistinctive features: Astro navigation calculator.