While on watch at sea you must maintain a proper lookout at all times. On a 700-foot cargo vessel being hand-steered during daylight hours in good visibility and clear of any navigational hazards，the lookout may be（）.

In case of any loss or misfortune it is the duty of（）to take such measures as may be reasonable for the purpose of averting or minimizing a loss which would be recoverable under this insurance.

You are in charge of a towing vessel that operates exclusively on inland waters. You regularly tow barges that provide services (cargo lighters，fuel barges，etc.) to foreign flag vessels in port. What will be accepted as proper credentials for you and your crew? （）

Which statement is TRUE concerning the tandem working arrangement of pedestal cranes when completing a quad lift? （）

Which statement(s) is/are TRUE concerning crane cargo operations? （）

You are carrying triethylamine，methyl methacrylate and isoprene in your multiple-product tanker. Which of the following statements is true? （）

You are approaching another vessel and see that she has the signal flag “J” hoisted. What should you do?（）

Horizontal subdivision decks forming watertight compartments in the columns of a semisubmersible ship increase the unit’s（）.

With a given load on the cargo hook，tension in a single span topping lift（）.

While on watch at sea you must maintain a proper lookout at all times. You are on a 200-foot cargo vessel with an unobstructed view astern from the steering position. The vessel is being hand-steered during daylight hours in good visibility and clear of any navigational hazards. The lookout may be（）.