Question 573General Subjects - Assistant Engineer

The correct answer is C) The navigational watch officer should be telephoned at agreed to intervals. When entering an unattended machinery space, the navigational watch officer should be informed and a communication plan should be established. This is because the navigational watch officer is responsible for the overall safety and operation of the vessel, and needs to be aware of any activities that may affect the vessel's operation or safety. Telephoning the navigational watch officer at agreed intervals ensures that the officer is aware of your presence in the unattended space and can monitor the situation. The other options (A, B, and D) are incorrect because the master, first assistant engineer, and chief engineer are not necessarily responsible for monitoring the activities in an unattended machinery space. The navigational watch officer is the appropriate person to be informed and contacted in this situation.