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This article's title is a callsign, an alias, or a nickname, as no proper name for the subject has been revealed.
ONIPRO 02.png
Production information




Covert insertion


Slipspace drive:

Shaw-Fujikawa Translight Engine


Service information

Last sighted:


Participated battles:


Known commanders:

Captain Lucius R. Jiron




PRO-49776[1] was the hull classification symbol of a prowler in service with the Office of Naval Intelligence during the Human-Covenant War. It was captained by Lucius R. Jiron.[2]

Operational history

Main article: Operation: WARM BLANKET

Shortly following the Battle of Miridem in 2544,[1] the ship was sent by the ONI to retrieve Doctor Catherine Halsey from a Covenant fleet trapped in a stellar magnetic field that prevented them from jumping into slipspace. Onboard, there were five Spartan-IIs who were eventually sent out to retrieve it using OF92-EVA Booster Frames stored onboard the stealth ship. After the Spartans successfully retrieved the package and the Covenant fleet jumped away, the stealth ship de-cloaked and destroyed the remaining Seraph fighters. After picking the Spartans up, the ship re-cloaked.[2]


In a Q&A for Halo Legends in 2009, Frank O'Connor stated that the ship is not a prowler when questioned about its sophisticated mode of stealth compared to typical UNSC prowlers.[3] This claim has seemingly been ignored in later fiction; not only was the ship's hull classification symbol established to be "PRO-49776" in the Adjunct content of the 2010 release of Halo: The Fall of Reach, with "PRO" being suggestive of "Prowler", but the Sahara-class prowler UNSC Aladdin was depicted as identical to the PRO-49776 in Spartan Ops, although smaller. Furthermore, Halo Mythos revealed the UNSC Port Stanley's (another prowler) hull classification symbol as "PRO-46328", which uses the same format as "PRO-49776", leaving little doubt as to the nature of the vessel.


List of appearances


  1. ^ a b Halo: The Fall of Reach (2010), Adjunct
  2. ^ a b Halo Legends, The Package
  3. ^ Re: The Package: "It's not a Prowler..."