CHARLESTON - If you saw a small private plane buzzing over the Charleston peninsula Friday morning, you may have thought there ought to be a law against a plane flying too low.

There is, according to the Federal Aviation Administration.

"The minimum safe altitude is 1,000 feet for flying over a congested area," said Kathleen Bergen, communication manager for the FAA's Southern Region.

It's 500 feet over uncongested areas, she said.

Several people contacted The Post and Courier on Friday and reported a single-engine plane was flying at very low altitudes over the peninsula shortly after 7 a.m.

Bergen checked with the FAA tower in North Charleston to see if the tower had any knowledge of the plane.

One person called the tower to complain about the low-flying plane, Bergen said.

There was not enough information to pursue the case, she said. Small private planes do not have to file flight plans.

"And we don't know how low it was flying," she said. "But on every plane, there is an identifying number on the tail."

The caller did not have the plane's tail number, she said.

Anyone who wants to make a complaint about a low-flying plane should make a note of the tail number before calling authorities, Bergen said.

Reach David W. MacDougall at macdougd@postandcourier.com or 937-5655.