单项选择题 Although the main business of the shipowners may be that of brewers，in their capacity as shipowners they must（）by the standard of conduct of the ordinary reasonable Shipowner in the management and control of vessels.

单项选择题 Although goods have been lost or damaged whilst in the custody of the Shipowner，（）not necessarily responsible，for his liability in respect of them may have been excluded by the rules of common law or by the express terms of the contract or by statute.

单项选择题 All masters，owners and agents（）that vessels when requesting Immigration and Port Health Clearance must anchor at the designated Immigration and Quarantine Anchorage and exhibit the appropriate signals.