Chung says that ideally the submarine force should be able to maintain a tripartite distribution. To do this, there would be one ship on stand by for each one patrol, as well one sub in for its regular drydock overhaul. Calculating on this basis, the ROC could do with an additional eight "grey ladies" in order to have four subs actually on combat patrol at any time.
鍾堅教授認為，潛艦的兵力至少要維持「三三制」，即三條船，一艘巡邏，一艘機動待命，一艘在船塢作定期保養，照這樣計算起來，我國的潛艇至少還要八艘以上才夠。