On Tuesday, the United States Navy announced that it had accepted delivery of its second Zumwalt class stealth destroyer, slated to become the USS Michael Monsoor once it has been commissioned.

Once expected to become the new workhorse platform of the U.S. Navy, the Monsoor is the second of only three Zumwalt class destroyers the branch will take receipt of — a sharp decline from the initial order of 32 ships. The first vessel, also the class’ namesake, Zumwalt, was delivered in May of 2016.

The Monsoor hasn’t truly seen the end of its construction phase, however, as the destroyer will still need to have its combat systems installed — a process the Navy anticipates can be completed within the coming months, though officially, the Monsoor isn’t expected to be fully operational until sometime in 2020. The suite of combat systems yet to be installed include weapons platforms, sensors, and the ship’s communication suite.

“Delivery of DDG-1001 [Michael Monsoor] marks the culmination of years of dedication and hard work from our Navy and industry team,” said Capt. Kevin Smith, the program manager for DDG-1000, in a statement. “We have incorporated many lessons learned from DDG 1000 [Zumwalt] and are proud of the end result. DDG 1001 will be a tremendous asset to the Navy.”

The Monsoor will ultimately be equipped with Raytheon’s SM-6 missiles, a platform that Raytheon claims is the only missile that can be used to engage enemy aircraft and enemy ships as well as serving as a projectile interceptor for ballistic missiles.

“Deployed on cruisers and destroyers in the U.S. Navy, the SM-6 missile provides Joint Force and Strike Force Commanders fleet air defense against all types of aircraft – manned and unmanned; land-attack anti-ship cruise missiles in flight; ballistic missiles in their terminal, or final, stage of flight over land or sea; and targets on the ocean’s surface.” Raytheon claims.

The missile is also considered to be highly cost-effective – as it couples legacy airframe and propulsion systems with an advanced targeting apparatus.

It’s fitting that the Navy would choose to add such a cost effective missile to the Zumwalt class of ships, as the vessels themselves were developed with the intention of including the Navy’s 155mm Advanced Gun System (AGS). The new weapon system was supposed to fire Long-Range Land Attack Projectiles at targets as far away as 80 nautical miles, but as the number of Zumwalt class ships being ordered dwindled, the cost of the advanced projectile skyrocketed.  Before the Navy opted to swap in the cost effective SM-6, the Navy was looking at spending a whopping $800,000 per round for the AGS.