请翻译另外在《船舶水污染防治技术政策》中将黑水和灰水都认为是污水并同时要求应逐步实施灰水管控、在饮用水水源保护区等不得排放生活污水的水域内应采取将生活污水收集储存在船上相应装置内并关闭排水阀等控制措施防止生活污水进入环境水体并按规定对相关控制措施进行记录。但该文件仅为指导性文件缺少法律强制性。

In addition, in the "Technical Policy for Prevention and Control of Ship Water Pollution", both blackwater and greywater are considered as wastewater, and it also requires the gradual implementation of greywater management. It states that in water areas where domestic wastewater is not allowed to be discharged, such as drinking water source protection zones, measures should be taken to collect and store domestic wastewater in corresponding devices on board the ship and to close the drain valve to prevent domestic wastewater from entering the environment water bodies. The relevant control measures should be recorded according to regulations. However, this document is only a guiding document and lacks legal enforceability.