Besides the AWACS aircraft, the C3 system and other arms just sold the Saudis, they and other Persian Gulf states, with U.S. encouragement, are acquiring through commercial and military sales a massive array of equipment, according to sources. It includes:

Saudi Arabia

* Three DOD C3 studies--One each for the air force, army and navy--costs unknown.

* Air force underground command operations center to coordinate massive air operations; already under construction in Riyadh excluding the C3 system, which was part of the AWACS package--$500 million.

* Air force construction for five sector command centers and five sector operation centers that will conduct air operations in five regions, each tied to major bases, local radar sites, surface-to-air missiles, smaller bases, two operation centers, and to sector operation centers where data is collected and processed; each can handle more than a wing (70) F15 fighters using the $1.3 billion; includes reinforced runways, parking ramps, shelters, spare parts, munitions storage, oversized storage facilities for U.S. use in each corner of the country--$1 billion plus.

* Saudi army C3 system designed by Litton Data Command Systems tying army units, bases and Hawk missile system to master C3 network at central command in Riyadh--$1.6 billion.

* Land forces facility construction--The King Khalid Military City at Al Batin in the northeast will be army command center and potential sixth sector command and operations center in C3 system--$6.3 billion.

* Saudi navy C3 ties ships and communications stations at Jidda, Jubail, and Riyadh to military headquarters in Riyadh--more than $1 billion.

Naval facility construction--Corps of Engineers supervised construction of two new naval facilities, one on the Red Sea near Jidda, the other on the Persian Gulf at Jubail built to U.S. Navy requirements--$5.2 billion.

* JTIDS/Have Quick--U.S. and foreign sources say these and other equipment will be used to upgrade the Saudi system "as circumstances dictate"--costs unknown.

* Satellite and hookup for the C3I system dedicated to military use; estimated cost--$200 million to 300 million.

* Civil aviation ground radar--In addition to the 10 sets of long-range radars and ground entry stations sold under AWACS, there are 12 more sets being commercially sold by the civil aviation administration and tied into military as well as civilian network--$700 million plus.

* Mobile ground radar--Six previously purchased mobile ground radars, which will be tied into C3 system purchased as part of AWACS package--$39 million.

* Four more AWACS planes--Option to lease in addition to the five sold them--costs unknown.

* Electronic warfare and intelligence equipment; some ground and some mounted on C130 aircraft and linked to C3I system; estimated cost--$1 billion.

* Surface-to-air missiles--16 improved Hawk missile batteries tied into C3 network plus more missiles--$1.6 billion.

* F15 aircraft--60 Saudi F15s purchased in 1978 plus two spares stored in United States, including followup contracts--$4.5 billion.

* F15 bomb racks or comparable equipment promised in the future--cost unknown.

* Oil storage--Network of hardened oil-storage facilities including some refined fuel for U.S. RDF with sites at Yanbu and elsewhere as backup if Gulf facilities are attacked--more than $8 billion (excluding value of oil).

* Prepositioned equipment and munitions sufficient to sustain U.S. forces during intensive combat for 90 days or more; Saudis to pay substantial share of costs; makes available not only AWACS but other military equipment just purchased including 1,177 AIM9L Sidewinder missiles, six Boeing 707 aerial refueling aircraft (plus option for two more) that can refuel the U.S. carrier-based F14s as well as Saudi aircraft--more than $1 billion (excluding AWACS package).

* Mini-Rapid Deployment Force--Protects oil fields from saboteurs; special remote-controlled sensors; research and development on nonfriction ballistics--costs unknown.

United Arab Emirates

* Air defense study in August, 1980, recommended purchase of surface-to-air missile system--cost unknown.

* Seven batteries of improved Hawk surface-to-air missiles currently being purchased to be plugged into master C3 system by Saudis--$800 million.

* Project Lambda including ground radar, electronic warfare equipment, brigade-level command posts, an integrated air defense operations center and equiping one or more C130 aircraft with Electronic Intelligence (ELINT), Signal Intelligence (SIGINT) and Communications Intelligence (COMINT) gear--$1 billion to $2 billion.

* C130s for the electronic intelligence equipment--cost unknown.

Oman

* Overall defense study in October, 1979, by Defense and State departments at U.S. expense--cost unknown.

* U.S. facility study in early 1980 to identify needed improvements for use by U.S. forces--cost unknown.

* Air and naval study in November, 1980, recommended coordination of naval efforts for threat to the Strait of Hormuz--cost unknown.

* RDF upgrading of facilities at Khasab and Masirah--$70 million plus.

Kuwait

* Surface-to-air missiles--27 improved Hawk launchers, 164 missiles and other associated costs--$1 billion plus.

Bahrain

* U.S. Army study recommending purchase of improved Hawk missiles--cost unknown.

* Improved Hawk surface-to-air missiles--To be paid for by Saudi Arabia and integrated into the Saudi air defense network--$200 million.

Qatar

No known purchases to date.

Gulf-Wide

* 100 to 150 fighter-planes--Anthony Cordesman, an administration witness, has written that Saudi C3 will absorb between 100 to 150 fighter-planes purchased by the other regional states; estimated costs including contractor training, maintanence and support--$5 billion to $10 billion.

Total: more than $47 billion, including the $8.5 billion AWACS sale.