X-Men Camping Night

The four mechs used the Super-Ejection Acceleration System to return to New York. The looted spoils, the heating vat filled with True Adamantium, were handed over to Dog Squad Saint Bernard, which lumbered back at low altitude.

One optical camouflage system and one simplified Isu Technology Distortion Field miniature generator. Though the latter could not compare to the full field generators on Skyhawk and Boar Mech, it should have been enough to evade most eyes during nighttime operations.

The reason it flew low rather than high was to avoid entering the surveillance range of ground radar.

Dog Squad Saint Bernard's chaotic, dog-sled-like appearance alone failed to meet the requirement of minimizing radar cross-section. Any attempt at stealth coating would have been pointless.

Judging from how Iron Man had been caught by the U.S. military during his first high-altitude test flight, the U.S. military's aerial surveillance had been extremely strict after the September 11 attacks.

There was no need to challenge the American Air Force's control over its own airspace. If he lost that gamble, he would lose an entire vat of True Adamantium.

After working so hard to steal it, only to hand it back afterward. Even for a Kryptonian who did not care about worldly money, losing that bet would hurt.

As for the obstacles they might encounter while flying low, there were other fast-moving objects in the air.

Besides the program logic inherited from BB and Kitty's games of hide-and-seek, which could control Dog Squad Saint Bernard's active evasive maneuvers, the Distortion Field could also knock "those things" away within certain limits.

Boar Mech had considered not traveling with the others and following Dog Squad Saint Bernard back to New York at a leisurely pace. Of course, "leisurely" here was only in comparison to the Super-Ejection Acceleration System.