View source for Prowler

{{Status|Canon}}
{{Disambig header|stealth ships used by the [[United Nations Space Command]]|the ground vehicle used by the [[Jiralhanae]] and the [[Covenant]]|Qavardu Workshop Prowler}}
[[File:The Red Horse 01.png|350px|thumb|The prowler {{UNSCShip|Red Horse}}.]]
'''Prowlers''', sometimes nicknamed '''"bats"''' by [[UNSC]] personnel,{{Ref/Novel|Id=HSS10|HSS|Chapter=10}} are a specialized form of stealth-capable [[UNSC corvette|corvette]] within the [[UNSC Navy]].{{Ref/Book|Id=Enc22|Enc22|Page=128-129}}{{Ref/Book|Enc09|Page=263}} Prowlers are used by the UNSC Navy for stealth [[wikipedia:Infiltration tactics|infiltration]]/[[wikipedia:Extraction (military)|exfiltration]], electronic intelligence gathering, and [[wikipedia:Minelayer|minelaying]] operations. Prowlers are exclusively operated by [[Office of Naval Intelligence]] personnel serving under the [[Prowler Corps]].{{Ref/Novel|FoR|Chapter=18}}{{Ref/Reuse|WF46}} Most prowlers are designated with the [[hull classification symbol]] '''PRO''', followed by a numeric designation.{{Ref/Book|Id=mythos|HM|Page=140}}

The [[Covenant]] and its [[Covenant remnants|remnants]] do not seem to operate many direct analogues to prowlers in their [[Covenant fleet|respective fleets]], due to the Covenant's broader focus on multi-mission capabilities. While they do maintain [[intrusion corvette]]s and an [[Covenant stealth ship|unidentified stealth vessel]] for broadly similar work, [[stealth shroud]]s are a relatively common fixture on several otherwise non-stealth warships such as the {{Pattern|Ceudar|heavy corvette|}} and {{Pattern|Makar|light corvette|corvettes}}.{{Ref/Book|Enc22|Page=268}}

==Overview==
===Role===
The prowler's primary role is to stay hidden while safely gathering battlefield intelligence, avoiding direct combat due to its light weapons and armor. Because of their tactical value and potential to change the outcome of any given combat situation, every UNSC [[battle group]] has at least one prowler assigned to its ranks.{{Ref/Novel|Id=GOO35|GoO|Chapter=35}} The prowler's standing orders to observe and record, even in the face of UNSC defeat, mean that the ships are explicitly ordered to ignore [[lifepod]]s and rescue beacons.{{Ref/Book|Id=WF46|HWF|Page=46-47}}

The prowler's only combat role, besides active combat monitoring and recording, is discreetly laying cloaked fields of [[M441 Hornet Remote Explosive System|Hornet]] and [[CBU-R98 Moray mine rack|Moray]] nuclear mines in orbital regions.{{Ref/Reuse|GOO35}} They may also be used to drop [[slipspace guidance beacon]]s in advance of a large UNSC fleet movement, allowing a given fleet to execute in-system jumps with much more precision than they may otherwise be able to.{{Ref/Reuse|Cole}} In addition, these covert roles mean that the ships are also well-suited to ferrying ONI strike teams and cargos of [[nuclear weapon]]s behind enemy lines, to covertly plant in heavily-defended staging areas and invasion beachheads. Unfortunately, these missions were nevertheless typically one-way.{{Ref/Reuse|WF46}} Other prowler roles include transportation for high-level commanders and prisoners.{{Ref/Reuse|H4EVG}}{{Ref/Reuse|SpOps}}

===Design details===
Prowlers are on the smaller end of the size spectrum of [[human starship]]s, typically ranging a few hundred metres in length or less. The {{Class|Sahara|heavy prowler}} is the largest conventional prowler design operated by the UNSC, and only measures up at {{Convert|922|ft|m|sp=us|disp=flip}}—barely more than the {{Class|Gladius|heavy corvette}}. Indeed, prowlers are low-profile ships built based on corvette design principles, and are considered slow, underarmoured and underarmed for conventional fights.{{Ref/Reuse|GOO22}} The small nature of prowlers serves to enhance their stealth capabilities, by presenting a smaller radar cross-section and less area for thermal emissions to radiate from. An exception to this rule is the comparatively gargantuan {{Class|Point Blank|prowler}}; informally referred to as a "stealth cruiser" due to its size, the ''Point Blank'' measures up at 485m in length—equivalent to a {{Class|Halberd|light destroyer}} and twice the size of even the already-noteworthy size of the ''Sahara''-class. ''Point Blank''-class ships tend to serve as command-and-coordination centres and motherships for smaller prowlers on longer-ranged expeditionary strikes.{{Ref/Reuse|Enc22}}

Prowlers may be fitted with EMP dampers which isolate the ship's electronics in the event of [[electromagnetic pulse]] strikes.{{Ref/Reuse|GOO35}} 

Aside from the more high-end stealth systems discussed below, prowlers may also be disguised as high-end civilian yachts, and often feature unassuming names such as the [[UNSC Lark|''Lark'']], [[UNSC Applebee|''Applebee'']] and [[UNSC Circumference|''Circumference'']].{{Ref/Novel|FOR|Chapter=28}}

===Stealth systems===
====Passive stealth systems====
Prowlers avoid detection through the use of physical features designed for low observability, low-profile sensor systems, and an array of stealth systems intended to mask the ship from both visual and sensor detection.{{Ref/Reuse|HUProwler}} Prowlers typically rely on passive stealth systems to remain undetected; ship designs employ techniques such as breaking up the thermal emissions via use of meta-materials in the hull coating known as [[Stealth ablative coating]] to break up the ship's [[radar]] signature.{{Ref/Reuse|WF46}}

====Active stealth systems====
Prowlers may also employ expendable stealth consumables such as heat sinks designed to defer the release of thermal emissions, flares and deception jammers. These systems are typically fired out of the ship, and are thus primarily employed when stealth has failed.{{Ref/Reuse|WF46}} Prowlers must have the capability to hide even from their own allies to avoid being tracked in the event a UNSC ship fell into enemy hands.{{Ref/Novel|Id=TW13|TTW|Chapter=13}}

Many of the aforementioned standard features were first tested on the {{Class|Chiroptera|subprowler}}s in the 25th century, and would later go on to become standard features in successive ONI designs.{{Ref/Reuse|Enc22}} However, Prowler designs deployed prior to the [[Human-Covenant War]] did not employ particularly effective [[active camouflage]] systems, and instead relied on the aforementioned passive methods to remain undetected. Future enhancements during the war and the successive reverse-engineering of [[Covenant]] and limited integration of [[Forerunner]] technology such as [[baffler]]s did allow for more active technologies to become standard by the late-war era and as of [[2558]], all prowlers employed some form of active hull camouflage technology.{{Ref/Reuse|HUProwler}}{{Ref/Book|Id=H4EVG|H4EVG|Page=190}}

[[File:ONIPRO 01.png|thumb|250px|[[PRO-49776]] exits its active camouflage field.]]
These more active forms of hull stealth technology encompass a variety of methods; a common form of programmable optical hull camouflage is the [[texture buffer]], which serves to line the ship with the aforementioned photoreactive coating and allow the surface to take on similar colouration as objects behind it such as [[planet]]s.{{Ref/Novel|Id=GOO32|GoO|Chapter=32}}{{Ref/Reuse|WF46}} However, even these texture buffer systems were crude in comparison to Covenant active camouflage, operating on a seemingly similar principle as the [[SPI armor]]'s [[photoreactive panel]]s. For example, the {{UNSCShip|Wink of an Eye}}'s stealth coating was fairly unstable, making the ship waver to and from visibility uncontrollably especially when exposed to rapidly changing backgrounds, such as the clouds of a gas giant.{{Ref/Anthology|Id=Cole|Evo|The Impossible Life and the Possible Death of Preston J. Cole}} One of the later camouflage systems employed on the {{Class|Sahara|heavy prowler}} involves a generated field of camouflage which surrounds the ship.{{Ref/Film|HLeg|Story=The Package (animated short)}}{{Ref/SpOps|Id=SpOps|Catherine}} These advances allowed prowlers to keep ahead of similar advancements in Covenant sensor technology.{{Ref/Site|Id=HUProwler|URL=https://www.halowaypoint.com/en-us/universe/vehicles/oni-prowler|Site=Halo Waypoint|Page=ONI Prowler|D=19|M=01|Y=2021}}

More traditional Covenant-based active camouflages and newer emission-distortion grids made their way into prowler designs in the [[Post-Covenant War conflicts|post-war]] era ships, though by [[2558]] only a select few {{Class|Winter|prowler}}s had been fitted with them.{{Ref/Reuse|WF46}} Active camouflage systems are limited in their usage, and can only keep the ship in stealth mode for a few minutes at a time—making their optimal usage a key consideration for planning.{{Ref/Reuse|GOO32}}

Engine emissions are typically masked via the use of baffled [[fusion drive]]s—a type of experimental and cutting edge [[maneuver drive]] only distantly related to typical UNSC fusion engines and maintained by specific ONI maintenance teams.{{Ref/Reuse|WF46}}{{Ref/Reuse|HUProwler}} These systems enable the prowler to appear to sensors the same temperature as the surrounding space, thus avoiding detection by infrared-range sensors.{{Ref/Novel|Id=GOO2|GoO|Chapter=2}} Because prowlers inevitably release some emissions, their systems are designed distort their signatures to appear as wreckage, low-threat vessels, or even friendly craft.{{Ref/Reuse|HUProwler}}

A prowler is able to stay stealthed for days or weeks, though the use of more active systems is limited to timeframes of a few minutes.{{Ref/Reuse|GOO32}} As such, they are not fully undetectable.{{Ref/Reuse|HUProwler}} Past fifteen minutes in a combat theater, detection by [[Covenant]] sensors is noted to grow at a geometric rate.{{Ref/Reuse|GOO32}} If tasked with sending out reconnaissance missions, typical prowler doctrine holds that the ship is to maintain orbit above a given [[planet]] for ten to twelve hours, hiding in the darkness of the planet's terminator zone while making passive observations. However, if time is of the essence, this can be ignored—especially if the prowler commander is willing to use [[Pelican]]s or other smallcraft as distractions.{{Ref/Novel|Oblv|Chapter=6}}

===Crew===
{{Main|Prowler Corps}}
Prowlers are primarily crewed by [[UNSC Navy|Naval]] service personnel from the [[Office of Naval Intelligence]]'s elusive "[[Prowler Corps]]." Prowler Corps officers begin their careers as regular naval officers, and have traditions and secrets unique to their insular clique—separating them from even the rest of ONI. Prowler crew recruitment is an unorthodox process, with no records existing of how candidates are selected or where they are trained.{{Ref/Reuse|WF46}} Prowler [[Captain (NAVCOM)|Captains]] ultimately a huge influence in these selection processes and the final say in prowler recruitment—a condition exploited on one occasion by [[Hector Nyeto]] to fill his crews with [[Insurrectionist]]-sympathetic officers.{{Ref/Novel|HSS|Chapter=25}}

Prowler [[commanding officer]]s often held the [[UNSC rank structure|rank]] of Captain, though these assignments were variable. In one instance, Captain [[Halima Ascot]] oversaw the entirety of [[Task Force Yama]] consisting of over a dozen prowlers, with [[Lieutenant Commander]] Nyeto holding command over the entire [[squadron]] [[Ghost Flight]]. In other instances, Captains such as [[Lucius Jiron]] and [[Tobias Foucault]] held command over only one vessel.

Prowler captains receive extensive training in the use of astronomical objects to their advantage in hiding their presence, as well as the deployment of drone networks to maintain concealment during missions.{{Ref/Reuse|HUProwler}} There is also a tradeoff between speed and stealth, and prowler commanders are forced to walk a fine balance when optimizing their stealth systems and engine power.{{Ref/Reuse|GOO22}}

===Sensors===
Prowlers are equipped with a wide variety of sensor equipment and electronic warfare devices, many of them mounted in a sensor array located in the craft's nose{{Ref/Novel|Id=GOO22|GoO|Chapter=22}} or in active sensor arrays fitted as large discs on the ship's dorsal surface.{{Ref/Reuse|H4EVG}} The [[X-ELF radar system]] is a feature aboard the ''Sahara''-class prowlers,{{Ref/Reuse|GOO32}} though prowlers may also contain sensing technologies such as a mass spectrometer{{Ref/Reuse|GOO22}} and [[Wikipedia:Lidar|lidar]].{{Ref/Novel|Id=MD10|MorDi|Chapter=10}} The specialised refit ''Sahara''-class prowler {{UNSCShip|Port Stanley}} was upgraded with a high-fidelity real-time [[Holography|holographic]] mapping suite which enables the generation of highly accurate images of a given area when working in concert with the prowler's subsidiary drones and other sensors.{{Ref/Reuse|MD10}}

Prowlers may be fitted with an additional complement of tactical drones for remote monitoring of other locations.{{Ref/Novel|Id=HSS14|HSS|Chapter=14}} These systems include [[BLACK WIDOW communications satellite]]s,{{Ref/Reuse|GOO32}} baseball-sized stealth satellites capable of being used for reconnaissance.{{Ref/Novel|Id=GOO40|GoO|Chapter=40}}

In the post-war era, advances from Covenant reverse-engineering have allowed more recent prowler designs such as the ''Winter''-class to incorporate [[Hyperscanner]] arrays.{{Ref/Reuse|WF46}}

===Armament===
[[File:HornetMine.png|thumb|250PX|HORNET space mines and other similar munitions are a common sight on prowlers.]]
Prowlers are among the slowest and most under-armed vessels in the UNSC fleet. As such, they have very little in the way of conventional starship munitions, and rely on their stealth systems to stay alive.{{Ref/Reuse|GOO22}} The most well-equipped prowlers in service, the {{Class|Razor|prowler}}, was equipped with [[Shrieker missile|M28 Shrieker missile]] pods and [[Argent V missile]]s, allowing it to hold its ground in a fight if needed.{{Ref/Reuse|Enc22}} Most prowlers were less lucky, with the ''Sahara'' and ''Winter'' close possessing no conventional missile complement at all.{{Ref/Reuse|Enc22}} The smaller ''Winter''-class prowlers only hold twin [[Machine-linked autocannon|M8545 machine-linked autocannon]]s.{{Ref/Reuse|WF46}}

To make up for this, prowlers are often fitted with more in the way of strategic [[nuclear weapon]]ry. These range from the singular [[Shiva-class nuclear missile|M947 Shiva]] and [[Rudra-class nuclear missile|Rudra]]{{Ref/Novel|TTW|Chapter=13}} nuclear missiles on the ''Sahara''-class to the [[Fury tactical nuclear weapon]]s fitted onto the ''Razor''-class—with the latter serving as a self-destruct device should the ship be in danger of capture. [[Space mine]]s—both nuclear and nonnuclear—are a common strategic armament on prowlers, with the [[M441 Hornet Remote Explosive System]] and [[CBU-R98 Moray mine rack]] featured on the ''Sahara'' and ''Razor''-classes, respectively.{{Ref/Reuse|Enc22}}{{Ref/Reuse|WF46}} Nuclear weapons storage aboard a prowler is a risky tradeoff; the storage of nukes aboard the prowler in [[Slipstream space|slipspace]] will make it impossible to maintain stealth when exiting slipstream as the nuclear weapons emit a detectable [[Cherenkov radiation]] flare upon transition back to realspace. If stealth is of the utmost priority, a prowler may be forced to jettison its nuclear payload while in slipspace as to remain undetected.{{Ref/Reuse|GOO22}}

In addition to the lack of conventional munitions, prowlers more commonly equip more advanced weapon systems such as [[directed-energy weapon]]s. An [[Electromagnetic pulse|EMP]] cannon, the [[XEV9-Matos nonlinear pulse cannon|XEV9-Matos]], is fitted on the ''Sahara''-class as a powerful weapon capable of disabling a target for [[Naval boarding|boarding]].{{Ref/Reuse|H4EVG}} The ''Winter''-class is fitted with three [[M995 Backstop point defense laser]] turrets for its own defense.{{Ref/Reuse|Enc22}}

==Classes==
===Known classes===
*'''{{Class|Eclipse|prowler}}'''
*'''{{Class|Razor|prowler}}'''
*'''{{Class|Winter|prowler}}'''
*'''{{Class|Sahara|heavy prowler}}'''
*'''{{Class|Point Blank|prowler}}'''
<gallery class=center>
File:Patrick-sutton-prowler-01.jpg|{{Class|Winter|prowler}}
File:H4-ONIProwlerShip-ScanRender.png|{{Class|Sahara|heavy prowler}}
File:Enc22 SoTP PointBlank.png|{{Class|Point Blank|prowler}}
</gallery>

===Unknown class===
*'''[[Unidentified UNSC stealth ship|Unidentified stealth ship]]''' – At least one under construction aboard ''[[Argent Moon]]'' as of [[2558]].
*'''[[UNSC Taurokado|Unidentified heavy Prowler class]]''' – An unidentified classification of heavy prowler employed in the [[Post-Covenant War conflicts|post-war]] era.
*'''[[Unidentified prowler class]]''' – An unidentified prowler classification seen fairly often.
*'''[[UNSC Last Gleaming|Unidentified smaller class]]''' – A smaller prowler class employed in the early war.
<gallery class=center>
File:H5G-Stealth vessel.png|[[Unidentified UNSC stealth ship|Unidentified stealth ship]]
File:LC4_-_Taurokado.png|[[UNSC Taurokado|Unidentified heavy Prowler class]]
File:UNSC Prowler Red Horse.png|[[Unidentified prowler class]]
File:HWG LastGleaming.png|[[UNSC Last Gleaming|Unidentified smaller class]]
</gallery>

===Subprowlers===
"Subprowler" is an informal designation for a smaller stealth-capable spacecraft – often deployed by larger prowlers – that are used to infiltrate and exfiltrate personnel and cargo from planetary surfaces in a role not dissimilar to [[dropship]]s. Though designed with low-observable technologies, subprowlers also feature a series of [[electronic countermeasures]] and decoy capabilities that increase their survivability in the dangerous period when entering and exiting atmospheres, or when operating near advanced aerospace defenses.{{Ref/Reuse|HUProwler}} These can work by altering the subprowler's profile to resemble more common cargo shuttles and transports on sensor networks.{{Ref/Reuse|Enc22}} 

Subprowlers are generally not fitted with [[slipspace drive]]s, though this is not a hard-and-fast rule; ''Chiroptera''-class subprowlers were a notable exception to this rule, and operated compact—relative to the era—FTL drives. However, they were an exception to the typical rule, and often faced maintenance and mission expectations and threat profiles far different to what their successors would encounter.{{Ref/Site|Id=CFEE|URL=https://www.halowaypoint.com/news/canon-fodder-encyclopedia-extravaganza|Site=Halo Waypoint|Page=Canon Fodder - Encyclopedia Extravaganza|D=01|M=06|Y=2022}}

The [[Pelican]] dropships ''[[Tart-Cart]]'' and ''[[Bogof]]'' were modified in many respects to suit the role of subprowlers—though the role of stealth dropships are nonetheless removed from that of a subprowler.{{Ref/Reuse|CFEE}} The [[D102 Owl]] dropship was created in part to fulfill a niche between full subprowlers and more common dropships like the Pelican—a stealth-capable insertion shuttle that can be more widely employed across the [[United Nations Space Command]] armed forces without needing as much specialised maintenance.{{Ref/Book|Enc22|Page=150}}
*'''{{Class|Black Cat|subprowler}}''' – Small exfiltration ships used mostly as exfiltration craft to escape combat situations with stealth and ease, and have slipspace capacitor of limited use.
*'''{{Class|Chiroptera|subprowler}}''' – Early 25th century-era testbed for many of the stealth technologies that would later become standard across prowlers as a whole.
*'''[[U81 Condor]]''' – [[Condor]] variant occasionally classed as a subprowler due to its covert mission focus, despite lacking the specialised stealth technology characteristic of true subprowlers.

==Gallery==
<gallery>
File:HTV SorenShip Exterior Concept Prowler 1.png|An early unused design for [[Soren's ship]] in ''[[Halo: The Television Series]]'', in which it was supposed to resemble a UNSC prowler.
File:HTV SorenShip Exterior Concept Prowler 2.png|Another look at the unused prowler iteration.
File:HTV SorenShip Exterior Concept Prowler 3.png|Another look at the unused prowler iteration.
File:HTV SorenShip Exterior Concept Prowler 4.png|Another look at the unused prowler iteration.
</gallery>

==List of appearances==
{{Columns|content=
*''[[Halo: The Fall of Reach]]'' {{1st}}
*''[[Halo: First Strike]]''
*''[[Halo: Ghosts of Onyx]]''
*''[[Halo: The Cole Protocol]]''
*''[[Halo Wars: Genesis]]''
*''[[Halo Legends]]''
**''[[The Package (animated short)|The Package]]
*''[[Halo: Evolutions]]''
**''[[The Mona Lisa]]''
**''[[The Impossible Life and the Possible Death of Preston J. Cole]]''
*''[[Halo: Fall of Reach]]''
**''[[Halo: Fall of Reach - Invasion|Invasion]]''
*''[[Halo: Glasslands]]''
*''[[Halo: The Thursday War]]''
*''[[Halo 4]]''
**''[[Spartan Ops]]''
*''[[Halo: Initiation]]''
*''[[Halo: Escalation]]''
*''[[Halo: Mortal Dictata]]''
*''[[Hunt the Truth]]'' {{Mo}}
*''[[Halo: Last Light]]'' {{Mo}}
*''[[Halo 5: Guardians]]''
*''[[Halo: Fractures]]''
**''[[Rossbach's World (story)|Rossbach's World]]''
*''[[Halo: Envoy]]'' {{Mo}}
*''[[Halo: Battle Born]]''
*''[[Halo: Lone Wolf]]''
*''[[Halo: Renegades]]''
*''[[Halo: Shadows of Reach]]''
*''[[Halo: Point of Light]]''
*''[[Halo: Divine Wind]]'' {{Mo}}
*''[[Halo Infinite]]'' {{Mo}}
*''[[Halo: Outcasts]]'' {{Mo}}
}}

==Sources==
{{Ref/Sources|2}}

{{Human Ships}}

[[Category:Prowlers| ]]
[[Category:UNSC ship classes]]