A Minnesota rescue team spent hours in the hunt for Tyler Doyle. Here’s what they did.

Four volunteers from Minnesota-based Northstar Search and Rescue would spend a combined 9 1/2 days traveling to and then plumbing miles of Carolina coastline with dogs specially trained in the detection of human remains in the search for missing boater Tyler Doyle.

Their logs reveal how fast paced, uncertain and exhausting the search came to be — sometimes relying just on manual navigation and animal mannerisms for clues.

Tyler Doyle 911 tapes reveal what happened the afternoon his boat sank while duck hunting

Temperatures ranged from 49 to 74 degrees.

Wind gusts got up to 23 mph and several dogs changed their behavior in spots — but crews departed no closer to solving the mystery than before they arrived.

Deacon ‘frantically moved around’ at one point during the search

Handler Diane Butterfield and her dog, Deacon, got to the search area on Feb. 7 and traveled by boat from Doyle’s last known point to southeastern area of the Intracoastal Waterway and into the Atlantic Ocean.

“Upon reaching the area where Tyler was last seen, we began gridding the area in south/north grid pattern. K9 had changes of behavior at (two) waypoints, where he leaned over the boat tasting the water and moving back and forth in the boat trying to locate the odor,” Butterfield wrote.

Deacon responded to two other way points further down the route before the team got back to their base of operations.

On Feb. 8, Butterfield and Deacon moved to a dock and private boat launch along Little River Drive to confirm an “alert” found north of the jetties.

Deacon and another dog picked up a scent, but the location wasn’t documented after a GPS device fell into the water.

The next day, Deacon responded to “pockets of odor” along several coastal areas, with his strongest response coming in an area just north of Sunset Beach, N.C.

“K9 frantically moved around the sides of the boat whining, leaning over the bow and sniffing the interior of the boat where odor tends to settle,” Butterfield wrote.

Deacon ended his work by inspecting locations near Ocean Isle Beach, N.C.

In all, Butterfield and Deacon spent nearly 84 hours committed to the search between travel time and field work.

Sophie spent almost three weeks in the field

Heath Glassburn and his dog Sophie got to Little River on Feb. 6. The duo were dispatched to Tubbs Inlet off Ocean Isle Beach the next day.

On Feb. 8, the pair were asked to inspect a “sonar anomaly” picked up by Wings of Hope, another rescue group. Sophie responded to a possible scent at low tide roughly 500 feet from shore.

The next week was spent spot checking various locations. On Feb. 17 — more than three weeks after Doyle was last seen — Glassburn and Sophie did aerial surveillance from the Little River inlet to Bald Head Island flying 700 feet above the water.

Two sonar anomalies on Feb. 19 drew Sophie’s attention. For the next eight days, way points along a circuitous route were gone over before the two headed home on Feb. 27.

Rosie spent a day navigating rocky terrain on the prowl for clues

On a 70-degree day with winds pressing in from the southwest at 20 mph, Rosie and handler Laura Zamarripa took a 40-minute ride with state Department of Natural Resources agents to a North Myrtle Beach outcropping.

Just before noon on Feb. 20, Rosie was released over sand and stone to hunt down any potential odors.

About a quarter way up the jetty, Rosie showed signs of detection and did so again about a half-mile further away. Zamarripa said in her report the behavior was inconclusive, as all the smells were new to the dog.

Their work continued until waters got too deep for Rosie to safely navigate.

Astor stepped aboard an Horry County Sheriff’s Office boat to help

Joan Dansky and her dog Astor began their two days of searching on Feb. 20 near Bird Island, N.C., south of the shoreline, the retriever’s behavior changed - he began whining and leaning over the side of the boat.

Astor acted in a similar way at another spot close to the original launching point.

By 1:30 p.m., the team walked a portion of beach northeast of the Little River inlet to the dunes south of the waterline.

“Astor showed no CoB (change of behavior) ... We headed back to base,” Dansky wrote.