We conduct open ocean tests of virtual mooring drone (VMD) prototypes in the tropical Northwest Pacific Ocean, a region where many typhoons are generated and develop, during R/V Mirai (Fig. 1) tropical ocean cruises in 2023 and 2024 to validate hull control, navigation, communication, and accuracy of atmosphere-ocean sensors in stormy condition with strong wind and high waves.
In the current year (2023), we successfully conducted the first short-term open ocean test of VMD prototype #2 off the east coast of Philippines during R/V Mirai cruise. In addition, we submitted marine scientific research (MSR) application for the final open ocean test in 2024 after international coordination with relevant countries in advance.

1. We conducted the first short-term open ocean test of VMD prototype #3 off the east coast of Philippines in Summer (June-July) 2023 during R/V Mirai tropical ocean cruise (Fig. 2) to examine ship control, navigation, sensor accuracy, and satellite communication, etc. (Fig. 3).
2. We established safety procedures on the deck of R/V Mirai and ocean, including deployment and retrieval prototype #3 during the test period, and coordinated with research safety committee of the representative institution in advance. As a result, we completed the test without any loss, damage, or accidents.
3. We submitted MSR application, which is required to obtain consent from coastal states if we plan activities in waters under the jurisdiction of foreign state, to MEXT (and then, MOFA) for the final open ocean test in 2024 after international coordination with relevant countries concerning the test in advance.