- "We've been trying to raise him using the M.A.L.P as a relay, but apparently it's been disabled."
- —George S. Hammond
The Mobile Analytic Laboratory Probe, or M.A.L.P., is a reconnaissance probe employed by Stargate Command and the Atlantis expedition to determine the conditions on the other side of an active wormhole before sending a team through, in order to make sure it's safe.
The M.A.L.P. is a remote-controlled drone with a variety of instruments to determine the safety of travel through the Stargate. It can monitor atmospheric conditions to make sure humans can survive on the other side. It can also transmit audio and video to make sure the area is clear of any potential hostiles, as well as confirming the presence of a functioning Dial Home Device so the team can return. (SG1: "Entity", "Revisions")
The Tau'ri have used two different types of M.A.L.P.s. The first kind, the Mark I, is a small, tread-equipped vehicle with a short grappler arm. This version was used during the first mission to Abydos, as well as during the first three years after the formation of Stargate Command. The second kind, the Mark II, is much larger, has a longer grappler arm, and uses conventional wheels (three on each side) as opposed to treads. It is somewhat more unwieldy than the Mark 1, but tougher. Mark Is were eventually phased out in favor of this model, though both were used at the same time during the transition. (SG1: "Urgo")
M.A.L.P.s of both types are employed in virtually every mission the SGC embarks on. They have often been disabled or destroyed when sent into hostile situations.
The Atlantis expedition employs the Mark II M.A.L.P. During their second mission, one of their M.A.L.P.s was lost when it was sent through a Spacegate. AR-1 has also once used a "M.A.L.P.-on-a-stick" (a video camera duct-taped to a stick) to see what was on the other side of a time dilation field. (ATL: "Rising", "Epiphany")
The Goa'uld also designed a reconnaissance probe that was the their version of a M.A.L.P. The probes are sent to various planets to investigate whether or not it is worth a visit by the Goa'uld. The probe is equipped with plasma repeaters, a defense shield, and a subspace transmitter to alert its owners if it encounters hostiles. (SG1: "Heroes, Part 1")