Any vessel which has suffered any casualty limiting the capabilities of its steering, propulsion or navigational equipment or which is otherwise limited by its speed, draft or other factor in its ability to navigate such that its navigation will be of extraordinary duration or will occasion its pilot extraordinary care or trouble shall be obliged to receive 2 licensed pilots and to pay to each the full amount of pilotage required by this chapter; in the event that such services are provided by a single pilot, the pilot may charge up to double the pilotage amount calculated in accordance with the rates of this chapter.