“Actually, as anyone with eyes can see, these are whales. They've been known to feed along the edges of eddies. There are a couple of teams trying to track whales to their feeding grounds.”

“Using whales to find whorls,” Trout observed.

Aubrey grimaced at the wordplay. “There are better ways to find these puppies than tagging sperm whales. Thermal expansion causes the water inside an eddy to create a bump in the ocean that can be traced by satellite.”

“What causes ocean currents to shed these eddies?” Trout said.

“That's one of the things we hope to learn on this expedition. You two are ideally suited for the project. Gamay can apply her biological expertise to the question, and we're hoping you can come up with some of the computer models you're so good at.”

“Thanks for inviting us aboard. We'll do our best,” Gamay said.

“I know you will. This goes beyond pure science. These big swirls can be real weathermakers. A stalled ocean eddy off the California coast can produce cold temperatures and rain in L.A. Similarly, in the Atlantic an eddy spinning off the Gulf Stream can produce thick fog.”

“Not much we can do about the weather,” Trout said.

“That's true, but knowing what to expect will allow us to adapt to it. The ocean eddy survey could be vital to the nation's economy. The safety of commercial shipping and the flow of petroleum, coal, steel, cars, grain and computerized cargo depend on accurate weather forecasting.”

“Which is why NOAA is so interested in what we're doing,” Trout said.

Aubrey nodded. “That reminds me, I've got to talk to the captain about our schedule.” He rose from his seat and pumped their hands. “I can't tell you how pleased I am to be working with you guys again. We're having a get-to-know-each-other party tonight.” He slid the napkin across the table to Trout. “There will be a quiz on this material in the morning, wise guy.”

Luckily for Trout, Aubrey was only joking about the quiz, although the orientation was comprehensive. And by the time the survey ship dropped anchor, both Trouts had become well versed in ocean eddy science. From the vantage point of the ship's deck, the sea in the vicinity of the swirl looked no different from any other part of the ocean, but satellites and computer models had shown it to be moving at approximately three miles per hour.

Trout had done some computer graphics of the ocean bottom in the vicinity of the swirl, and Gamay concentrated on the biological applications. The phytoplankton survey was a vital piece of her research, which was why she was so anxious to get it out of the way.