There are actually forecasts online that predict the best visibility for the lights on the Icelandic National Weather website.

实际上，在冰岛国家天气预报网站上有在线预报，可以预测最佳的北极光能见度。

In conditions of good visibility, seamen in the Mediterranean often had the mainland or islands in sight, which greatly facilitated navigation.

在能见度高的情况下， 地中海的海员往往能看到大陆或岛屿，极大地方便了航行。

A courier crossed from the hole that led down into the basin, said: " The Sardaukar and Harkonnen patrols are pulling back, Muad'Dib." " They expect the storm to spill too much sand into the basin for good visibility, " Stilgar said.

一名信使从通往盆地的洞口穿过，说道：“Sardaukar 和 Harkonnen 巡逻队正在撤退， Muad'Dib。 ” “他们预计风暴会将过多的沙子洒入盆地， 以提高能见度， ” 斯蒂尔加说。