(U.C. 0079.12.03 - 0079.12.07)
With Zeon losing their foothold on Earth, the 603rd is given a new project — to infiltrate a prototype weapon into the Federation airspace and attack Federation warships launching from Jaburo. Ensign Werner Holbein, an arrogant naval officer who boasts a proud maritime family tradition, is assigned to the Jotunheim to pilot the mobile diver unit Ze'Gok.
However, the testing goes well below expectation, as both Holbein's test drop ends in failure after unable to score any hit with the Ze'Gok. On the third and final drop, Holbein manages to destroy a handful of Federation ships with a direct reentry/free descent before letting loose the attached "Kuhblume" beam scatter cannon. Before he could celebrate, two Core Booster II fighters arrived and shot down both the Ze'Gok and the retrieving Gaw carrier, killing Holbein in the process.
U.C.0079 １年戦争末期。第603技術試験隊の任務は、試作兵器「モビルダイバーシステム」の運用試験である。
この試作兵器とともに、パイロットとして海兵のヴェルナー・ホルバイン少尉がやって来た。 今回の試作兵器に課せられた任務は、ジャブローから宇宙へ打ち上げられる連邦軍宇宙艦隊を撃墜するという大変危険なものであった・・・。
U.C.0079 1년 전쟁 말기제603 기술시험대의 임무는 시제무기 모빌 다이버 시스템의 운용시험이다. 이 시험무기와 함께 조종사로 해병 베르너 홀바인 소위가 왔다. 이번 시험 제작 무기에 부과된 임무는 자브로에서 우주로 발사되는 연방군 우주 함대를 격추시키는 매우 위험한 것이었다.
本机是用水中MS魔蟹紧急改造的产物。为了作为紧急赶造的L.W.C（大量兵器输送用货柜）的制御用机动管制单元而使用。本机共出动3次，第3次出动时击落从贾布罗出发前往太空的沙拉米斯级4艘、麦哲伦级1艘，战果显赫。但是由于对于驾驶员要求异乎寻常的高，所以被放弃了。
上宇宙决战已呈现出大势所趋，两栖用MS还有何余热可供发挥呢……威路拿?荷尔拜因少尉对加布罗决死的突击，究竟又能给战局带来什么转机呢……
