Deadline to receive bids for amphibious aircraft services extended Published: 5:52 PM, May 19, 2021 The deadline for receiving applications for the establishment and operation of amphibious aircraft has been extended to July 4, 2021 SHARE Muscat: To promote tourism and related activities in the region, the Civil Aviation Authority (CAA) has called for requests to establish and operate amphibious aircraft services. The deadline for receiving applications for the establishment and operation of amphibious aircraft has been extended to July 4, 2021 CAA said that a detailed offer shall be attached with the application that includes the economic feasibility study, the company's business plan, and proof of financial ability.