266. During maneuvering, a vessel has just reached full ahead from a dead slow condition. Which of the following actions reflects the first operation of the gland seal regulator shown in the illustration

The bellows and connecting link initially react to changes in gland pressure/vacuum caused by increased turbine speed. This movement precedes any action of the pilot valve bushing, valves C and D, or the needle valve, which are components controlled by the initial bellows response.