The LISATM was designed, developed and installed by a NAV Portugal team. At the end of June 2000 NAV Portugal decided to internally develop an air traffic control system for the Lisbon FIR.  This system is being developed in phases. The first phase came into operation at the start of April 2001.
The objective of the development of this system was to overcome the limited capabilities of the previous system (NAV 1), extending air traffic services beyond that system’s useful life.

Changing towards up-to-date technology, introducing Air Traffic Control improvements which meet and respond to the following aspects:
- international commitments for the blending and integration of systems;
- air traffic growth;
- increased air safety;
- improved service quality and efficiency;
- guarantee that the company is at the technological forefront, crossing to the challenge of affirming itself as one next to the other ANSP’s.

LISATM has the following features:
- The most up-to-date technology available on the market;
- Duplication/Triplication of equipment;
- ATC Radar Tracker and Server (ARTAS) multi-radar system;
- Up to 30 simultaneous radar information sources;
- Up to 2000 system tracks (aircraft);
- Radar viewing based on the X-Windows standard;
- Possible increase in currently installed viewing numbers (30);
- Possibility of individually selecting the radar sources (multi-radar or local), correlated or not with the flight plans, to be used in contingency situations;
- Correlation between the radar track and the flight plan also based on the aircraft route;
- Automatic updating of the route point estimates by radar information;
- RVSM (Reduced Vertical Separation Minima) in use;
- Automatic distribution of flight progress tapes;
- Automatic interface between the control tower and the airport operations service;
- Flexibility of re-design of national air space, enabling the number of sectors to be matched to the traffic demand;
- Use of STCA - Short Term Conflict Alert;
- Use of OLDI - On Line Data Interchange
- Possibility of multiple developments, including MTCA.

With the entrance in operation of the STCA and of the OLDI it can be considered that LISATM reached its majority and maturity in 2003.