Tidelands Limited IV, Houston, has applied to the Maritime Administration for a Title XI guarantee to aid in financing the construction of a nonself-propelled jackup drilling rig to be operated in the Gulf of Mexico.

Bethlehem Steel Corp.'s Sparrows Point, Md., yard has been proposed to build the rig, with delivery scheduled for May 1982. The requested guarantee is for $24,500,000, or approximately 75 percent of the $33,130,000 estimated cost of the rig.