Umizaru Evolution

Coast Guard officer Senzaki Daisuke is in training to become a rescue diver. His course completed, he’s ready for his first assignment on board an aging
rescue vessel.
The ship’s captain is due to retire soon and the head diver refuses to offer Daisuke any guidance. To add to his woes, his girlfriend doesn't seem to be too happy to see him, despite their maintaining a long-distance
relationship via the phone.