in charge can indicate people?

[Liqichao]

hello,
As turbulence was becoming increasingly more serious, in charge advised the crew and helped to secure the galleys(only unsecured area) as passenger seatbelt signs were still illuminated.

i am confused with 'in charge' , who are in charge? and who take the advice? why in this sentence there is no subject before 'advised' that verb?

thank you for your answers.

[Alan]

Hi,

You would have to say: 'those in charge'.

Alan
_________________
English as a Second Language
You can read my ESL story Word Story: Health