visibility conditions

Several influences, such as wind, visibility conditions, navigation aids, pilotage, etc., were not directly included in the method because their effects were difficult to quantify.

此方法不包括这几个影响因素：风、能见条件、辅助航行设施及领航费等，因为其影响不易量化计算。

Atmospheric attenuation of scene contrast is studied theoretically on the basis of radiometric principles, and the relationships between the measured maximal detection range for a target and visibility distance under two possible conditions are obtained.

根据辐射度学原理，从理论上研究景物对比度在大气传输中的衰减，得到了在两种可能的条件下所测得的目标最大探测距离与能见距离的关系。

Smokey conditions and poor visibility are causing crashes.

由于浓烟弥漫和低能见度,造成多起事故.

Every vessel shall proceed at a safe speed adapted to the prevailing circumstances and conditions of restricted visibility. A power-driven vessel will have her engines ready for immediate manoeuvre.

每一船应以适合当时能见度不良的环境和情况的安全航速行驶，机动船应备好车以备紧急操纵。

Spatial and Temporal Distribution of Visibility under Fog and Haze Conditions in Guangdong Province: Annual and Inter-Annual Change A haze lay over Casablanca on the 12th and 13th.

广东雾霾天气能见度时空特征分析&年际年代际变化12和13两日霾雾笼罩卡萨布兰卡。