Merchant shipping firms have generally avoided arming crew or security guards for reasons of safety, liability and conformity with the laws of the countries where they dock.
商船公司一般出于安全、责任以及遵从停靠国法律的原因，不给其船员或安保人员提供武器。
2
The application of law of the international contract experienced an origin and development that went to law of nations to law merchant in the Middle Ages from conflict of laws to unify private law.