Which methods can Repair Party Investigators use to establish communication with the Repair Party Leader?

The correct choice highlights methods specifically aligned with traditional naval communication protocols and practices used during damage control operations. The options listed in this answer—Brick, J-dial, and message blanks or messenger—are tools and methods recognized for establishing reliable communication in shipboard environments, especially during emergencies.

Brick refers to a system that can be used for communicating urgent information, while the J-dial represents a type of communication device commonly used on naval vessels. Message blanks and messengers are conventional means for sending written or verbal messages, ensuring that critical information can be relayed quickly and accurately among team members. These methods demonstrate the essential practices of maintaining effective communication channels during damage control situations.

The other options, while they might include useful tools in general communication, either do not align with the specific context of a Repair Party setting or include technologies that might not be standard practice in that high-stakes environment. Hence, the selected methods in the correct answer align closely with the historical and operational framework of damage control communication practices.