Which しんこう is the one Yotsuba-chan meant when she said 「しゅっぱつしんこ〜」 in the manga excerpt below? WWWJDIC lists so many two-kanji words that read as しんこう, and even after eliminating totally irrelevant ones there are still a few plausible choices:
新興 【しんこう】 (n,adj-no) rising; developing; emergent;
進行 【しんこう】 (n,vs) advance; progress;
進攻 【しんこう】 (n,vs) attack; drive; advance; invasion;
進航 【しんこう】 (n,vs) sailing on

(From manga 「よつばと!」, 4th volume, page 30)
進航. It is not used regularly among people who are not particularly related to sailing. – Sep 23 '11 at 18:00