Final answer:
To avoid collision, a vessel should be capable of taking proper action, which may include maneuvers like decelerating or altering course, depending on the situation.
Step-by-step explanation:
The action a vessel should be capable of to avoid collision is c) Taking proper action. This may include a range of maneuvers such as quick turns, acceleration, deceleration, or an emergency stop, depending on the specific situation. For example, if a ship is moving in the forward direction at a steady rate and needs to avoid a collision, it might first decelerate and then continue to slow down with less deceleration, altering its course as needed to prevent an incident.
In another scenario, a person standing up from a seated position or a car accelerating while driving both involve acceleration, which falls under the concept of 3.1 Acceleration in physics and is critical for understanding how vessels act in motion.