Mist
Suspended microscopic water droplets or ice particles near the surface that reduce visibility but leave it at 1,000 metres or more.
Under the meteorological distinction, fog reduces visibility below 1,000 metres while mist is the less dense obscuration above that threshold. Both can form through cooling moist air, evaporation or mixing, and visibility can vary rapidly across a relatively small area.
Even mist can obscure small craft, lights, land and navigation marks and can combine with rain, spray or darkness. Safe speed, effective lookout, sound signals where required and cross-checking of radar and navigation information remain necessary as conditions deteriorate.
