Mumbai: The wait for travelling in an amphibious aircraft that can land on runways or in water bodies during the course of a single journey is all set to get longer. The Maharashtra Tourism Department Corporation’s (MTDC) plan to begin the seaplane services in April has hit a major roadblock as the ministry of defence (MoD) is apparently going slow in issuing a No-Objection Certificate (NOC) for the project. Sources said the MoD is studying the proposal minutely in view of security reasons and has sought answers to its various queries from M/S Mehair Ltd, the operator of the project. A defence spokesperson said, “The NoC application is under process.”