Disclaimer: "Boukenger" is owned by Toei Company. The character "Verne" is mine.
The Atlantic Ocean
DaiVoyager, which was restored just enough to be in it's ship-form, was floating on the ocean's surface. Upon it, there were four of the Boukengers.
"Please remind Natsuki..." Natsuki suddenly started, "Why are we here?"
"Remember that virus, which sent a signal into space?" Masumi explained her, "Part of that signal was intercepted here."
"Natsuki knows that." Natsuki replied, "But I don't understand why."
"Well, since that virus was sent by the Atlanteans, it makes perfect sense." Souta explained to her, "Not much is known about them, except that their island was located here."
"Which is also why this ocean is called the Atlantic." Masumi added, "Named after Atlantis. What else is new?"
"Still, why would that signal be intercepted?" Eiji asked, "Unless there's something here that would do that."
"They did say that Atlantis sank to the bottom." Souta suggested, "If they were as advanced as people say they were, it's possible there are some survivors."
"But why did Natsuki-tachi never search the ocean before?" Natsuki didn't understand this yet.
"Looking for a sunken island in this ocean?" Masumi questioned, "It's like looking for a needle in a haystack. At least with that signal, we have an idea where to look."
"I only wish my Gou Gou Changer was restored." Eiji complained, "I hate just waiting here."
"I'm sure Makino-sensei is rushing to it." Souta assured him, "But with everything else that's damaged as well... even DaiVoyager is not completely ready for action."
"I suppose Natsuki-tachi is lucky that Chief-san and Sakura-nee-san's changers were still intact." Natsuki remarked.
"They only needed to be readjusted, so that incident with the virus won't happen again." Souta added.
"So for the moment..." Masumi sighed, "... we'll have to rely on the strength of just three of us. Red, Pink, and... Emerald."
A few miles below them, Gou Gou Marine was searching for the source of the signal.
"We should be seeing something by now." Sakura remarked.
"This deep in to the waters, even the Marine's lights aren't enough to see anything." Satoru realized.
"Thank the military for echoscopes." Sakura laughed, "I just wish SGS Europe would help us, as they're nearby."
"Well, it is more or less our fault that the Atlanteans know about us." the third person in the marine, Verne, remarked.
"So it should be our job to do something about it." Satoru finished.
"Thank you, Satoru." Verne replied.
"I guess you're right." Sakura agreed.