Armored Core Wiki

Defenf Helicopter Crew is a mission in Armored Core 3.


Requester: Crest

Advance: 0

Upon success: 40000

Operation Area: Marine Platform

Enemy Forces: Unknown

Objective: Protect the helicopter crew

Operation Code: Clothesline

Client Name: Crest

Place Name: Marine Platform

Start Time: 18:00

Security Level: 1

Estimated Success Rate: 49%

Recommended Raven Rank: C


The helicopter that we dispatched to recover the capsules came under fire and went down nearby.

The crew survived, but they're pinned down on a marine platform. It's only a matter of time before they're overrun.

Protect the crew until backup arrives.



Laine Meyers:Entering area of operations. The helicopter crew is trapped on the platform. Backup will be here shortly. Protect the crew until then.

Recovery Chief:Raven, you made it! When the helicopter was hit its cargo was scattered about. Please recover as much of the cargo as you can.

Recovery Chief:We’re taking fire!

Recovery Chief:Raven, cover us!

Recovery Chief:Ahhh...!

Laine Meyers:All crew members perished. Mission failed.

Recovery Chief:We’ve made contact with the backup team. Thanks again for your help.


Funds: 0c

  • 4 Powered Suits (The helicopter crew that must be protected)


Your job is to protect the 4 unexpectedly durable powered suits for 2 minutes and 42 seconds against waves of enemies firing rockets and missiles. As usual with defense missions, you should consider a back radar, and as usual for water missions, you should consider hover legs. Decoys may be useful here to protect the crew from the Sea Goblins' missiles.

The mission starts with you far away from the powered suits, which are under attack from a wave of Turbinid helicopters. After taking them out, 2 Sea Goblins appear, and for the rest of the mission, a new Sea Goblin appears every time one is destroyed, until there are none of them left. More helicopters appear periodically, several at a time, and they should be prioritized.

For the S-rank, you'll have to protect all 4 crewmen. This can be frustrating; sometimes, before you even make it to the platform they're trapped on, one of them has already gone down, and sometimes, they'll suicide into enemy rockets while floating above enemy vertical missiles, so rush over to where they are like mad. Logically, the best way to defend the crew is to prevent any enemies from attacking them in the first place, so a hover AC with the MWG-XCB/75 is extremely effective. The XCB/75 can down a helicopter in one shot even without E++, and a Sea Goblin in two shots. Take out every helicopter, then drop down under the platform to fight Sea Goblins until more helicopters appear - watch that radar! You should be able to wipe out every enemy with around 10-20 seconds left.


  • Normally the MPTA2 is a team of 3 powered suits acting as a single unit, but in this mission, each of the 4 helicopter crewmen is in a single powered suit.
  • The spherical objects scattered around the area are the helicopter cargo, and you'll receive 1000 credits for each one you pick up. There are 11 in total.