Which transportation method was replaced by the first airfield in the Cayman Islands?

The transportation method that was replaced by the first airfield in the Cayman Islands was the seaplane. The introduction of the airfield revolutionized travel to and from the islands, allowing for faster and more efficient air travel compared to the previously used seaplanes, which operated on a more limited basis and were dependent on water landing sites. The establishment of the airfield marked a significant advancement in transportation, facilitating increased tourism and trade, as it enabled direct flights and regular air service between the islands and other locations, transforming the islands' connectivity.

Travel by ferry and boat would have remained alternatives for local transportation and trade, especially before the advent of air travel. However, with the opening of the airfield, air transport became the preferred method for longer journeys, making seaplanes less necessary in the overall transportation infrastructure of the Cayman Islands.