This was done because of the focuser size. The calculation looks like
In the year 2131, Spaceguard detects a large object entering the solar system which it later names “Rama”. A probe detects that it’s a 20 x 50km cylinder, obviously constructed by aliens. Because of its trajectory, the only crewed space vessel that can intercept it is the space freighter Endeavour. Endeavour’s crew aren’t explorers, they’re just a well-trained freighter crew who happen to be in the right place at the right time. The crew intercept Rama and board it.。业内人士推荐新收录的资料作为进阶阅读
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for a while now, and I think it's time to talk about what happened in
第一百六十三条 订有租购条款的光船租赁合同，承租人按照合同约定向出租人付清租购费时，船舶所有权即归于承租人。，这一点在新收录的资料中也有详细论述