(self translate to English!><)
I think.
Ships are strong for massive blackouted with Natural disaster situation.
It does not depend on external electric power, and unlike aircraft ATC also unnecessary, so not worry about a power outage on lands, It is possible to voyage for a long time.
Moreover, even if the lighthouse stop by comptely blackout, it can Navigation with GNSS(GPS) in Now era.
also can use the celestial-navigation in Clear weather situation if GNSS unserviceable.
ほんとわけわからんだしつらい・・・><
Windows 秘話: ディスク上のサイズの正体 https://technet.microsoft.com/ja-jp/library/hh148159.aspx
北本連系の容量60万kWっぽい?><
ソース>< [pdf]地域間連系線の増強について - 経済産業省
[pdf] http://www.meti.go.jp/committee/sougouenergy/kihonseisaku/denryoku_jukyu/pdf/009_06_00.pdf
世耕経産相「苫東厚真火力発電所の復旧 少なくとも1週間程」 | NHKニュース https://www3.nhk.or.jp/news/html/20180906/k10011613591000.html
なんか厚真向斜っていう構造(?)っぽい><
地質図Naviのその場所&レイヤのリンク><
https://gbank.gsj.jp/geonavi/geonavi.php?lat=42.72033&lon=141.84858&z=13&layers=293,seamless_geo_v2