Safety Pilot

In aviation, the person (a certified pilot with valid medical and flight review) who rides shotgun in the plane looking for traffic while the primary pilot is under the hood, primarily to reduce the cost of accruing simulated instrument time or maintaining instrument currency. Even though a safety pilot can log time just looking for traffic and not flying the plane, etiquette dictates that a safety pilot get the opportunity to switch roles occasionally, get a free $100 hamburger at the local eatery on or near the airport, or some other legal quid pro quo outcome.