 The wood used is oak, Douglas fir and Nootka Cypress because of their flexibility, strength and low weight.This construction allows the hull to withstand a nearby blast from a mine, and also gives the ship a low magnetic signature.The ships use AN/SLQ-48 remotely operated mine disposal system supplied by Alliant Techsystems (ATK) and the EX116 Mod 0 remotely operated vehicle (ROV) mine neutralization system supplied by ATK and Raytheon.