Israel is to perform a major avionics modernisation on its 10-strong fleet of legacy Lockheed Martin C-130H transports.
Although a number of partial upgrades have previously been implemented, the Israeli air force says the latest effort will be "a complete revolution".
The enhancements will see engine management and navigation systems replaced with newer digital versions, an improved autopilot, and the installation of an up-to-date radar.
No details of the systems suppliers have been revealed, however, or the timeline for completion.
In addition, the air force has ordered a new simulator for the type, due for delivery in 2021, to reflect the changes to the aircraft.