MarAd has approved in principle an application by Tidelands II, Inc., a wholly owned subsidiary of Temple Drilling Co., Houston, Texas, for a Title XI loan guarantee to aid in financing construction of the offshore jackup drilling rig Cheyenne.

The 220-foot rig, which can drill in water 12 to 200 feet deep, is being built by Bethlehem Steel Corp., Sparrows Point, Md. The vessel is scheduled to be delivered by April 1982. Plans call for it to operate initially in the Gulf of Mexico. The Title XI guarantee amounts to $24,472,000, or roughly 75 percent of the vessel's $32,630,000 estimated actual cost.