Messages concerning weather conditions

1、Fleet weather forecast messages are th

Fleet weather forecast messages are the expected conditions in（）.Aa certain areaBall ocean areasCsome areasDimportant area

2、The transmission of messages respectin

The transmission of messages respecting the dangers specified is free（）cost to the ships concerned.AofBonCatDi

3、In extreme weather conditions, either

In extreme weather conditions, either hot or cold, control of the air conditioning plant presents （） difficulties.AfewBlittleCa littleDle

4、Under normal weather and sea condition

Under normal weather and sea conditions when securing a stack of containers with twist locks，lashings are required when the tier exceeds what height? （）ALashings are always requiredBOne containerCTwo containersDThree container

5、Distress traffic（）all messages relatin

Distress traffic（）all messages relating to the immediate assistance required by the ship in distress, including search and rescue communications and signals for locating.Aconsists ofBis consisted ofCconsisted ofDare consisted of

6、Which two messages c

Which two messages can carry the TSPEC from client to the AP?（）Aprobe requestBassociation requestCauthentication requestDreassociation request