S1:Good morning,.Chief. I'm Port Facility Security Officer.S2:Good morning.S1:I just come on board to discuss the security issue with you. May I have your Port of Call List?S2:Yes, here you are.S1:Thank you. Hmm, Douala, Abidjan, Dakar, they are all bad in the records of security.S2:That's true.S1:Did you take any precautionary measures to guard your ship?S2:Of course. We enhanced our vigilance and took procedures for security level two.S1:Have you experienced anything abnormal during your call in those ports?S2:No, nothing special.S1:Wonderful ! In our port , the situation is relatively smooth, and at present security level is one. Q4:When the vessel visit the posts of previous call, what was the security level?