Ensign David Robinson has received his marching orders and will spend much of the next two years working as a civil engineer at the submarine base at Kings Bay, Ga., according to Navy spokesman Ken Pease.

The 7-foot-1 Robinson was the consensus player of the year in college basketball last season, leading Navy to a 26-6 record. Like other recent Naval Academy graduates, Robinson has been on a month's leave and will report later this month to his new base, about 45 miles north of Jacksonville, Fla., and about 300 miles from Atlanta, the closest NBA city.

In April, the Navy ruled that Robinson would not be allowed to play professionally during his two years of active duty, but he is still expected to be the No. 1 choice of the San Antonio Spurs, who have the first pick in the June 22 NBA draft.

Spurs General Manager Bob Bass said he had not heard of the Navy's decision on where to send Robinson, but said, "I don't think it changes anything."

Bass said the Spurs have not had a lot of offers to trade the top pick, perhaps because they've ". . . always made a commitment to draft {Robinson} and keep him. We've been very demonstrative."

Asked if the Spurs would seek to retain the rights to Robinson past the 1988 draft, Bass said, "not at this point, because we plan on signing him as soon as we can, which would make it all academic."

Robinson will be allowed to play for the United States in the Pan American Games and the Olympics while on active duty. A couple weeks after reporting for duty, Robinson will leave to join the U.S. team for Pan Am Games practice in Louisville. The Pan Am Games are Aug. 7-23 in Indianapolis.

After that, Robinson will attend the Civil Engineering Corps school at Point Hueneme, Calif.; the first session Robinson could enroll in begins in January.

Robinson's father Ambrose said his son has not yet picked an agent to represent him in negotiations with the Spurs. David Robinson was not available to comment.

Under present NBA rules, if the Spurs pick Robinson and don't sign him to a contract within a year, he goes back into the player pool for the 1988 draft. The team picking him then will also have one year to sign him. If that team fails, Robinson would become a free agent.

NBA officials, however, have said there may be a different interpretation that would allow the Spurs to keep the rights to Robinson for more than one year. Last week, the league said it expected the issue might have to be settled in court.