Stanwick Corp., a management systems firm in Arlington that receives the bulk of sales from a contract with the troubled government of Iran, has reported continued gains for the quarter and six months ended Oct. 31.

Earnings for the recent quarter were $773,145 (74 cents a share) compared with $276,588 (27 cents) a year ago as sales increased to $5.8 million from $4.9 million. Six-month earnings were $1.4 million ($1.37) vs. $878.372 (84 cents) as sales increased to $11.3 million from $9.4 million.

A subsidiary, Stanwick International, is engaged primarily in providing maritime-related services to Iran and was responsible for 78 percent of overall revenues in the past six months compared, with 62 percent a year ago.

A Stanwick spokeswoman said last night that the company has "no concern" about its Iranian operations, although other American corporations doing business in that country have pulled out employes or developed contingency plans in the event the government changes.

Survival Technology Inc. of Bethesda reported a substantial improvement in sales and earnings for its first fiscal quarter ended Oct. 31. SurTech also announced a tentative agreement to acquire Medalert Corp., which provides a service of monitoring, by telephone, patients with implanted pacemakers.

Earnings in the recent quarter were $338,000 (14 cents a share) compared with a loss of $353,000 last year as sales rose to $2.1 million from $954,000.