Isolate, drain, and dry the salt water side of the heat exchanger. Pressurize the sea water side with compressed air. Visually inspect the jacket water expansion tank for bubbles.

Isolate, drain, and dry the jacket water side of the heat exchanger. Remove the shell inspection plates. Visually inspect the tubes along the tube lengths for seepage.

Isolate, drain, and dry the salt water side of the heat exchanger. Remove the waterbox inspection plates. Visually inspect the tube sheets for signs of seepage at each of the tube ends.

Isolate, drain, and dry both the salt water and jacket water sides of the heat exchanger. Remove the waterbox inspection plates. Visually inspect the tube sheets for signs of seepage at each of the tube ends.