COEUR d'ALENE - The second full day of searching for a 16-year-old Coeur d'Alene High student who presumably drowned in Lake Coeur d'Alene Tuesday was suspended late Thursday afternoon.

The search for Reggie Nault with a Kootenai County Sheriff's Office sonar boat near Arrow Point lasted from 5:30 a.m. to 3:30 p.m.

"We are looking at resuming on Monday with the sonar boat ... too much boat traffic on the water over the weekend for an efficient search," KCSO Lt. Stu Miller said. "We are also looking at bringing in search dogs over the weekend."

Nault, who played baseball for Coeur d'Alene High and with the Spokane Dodgers club team this summer, was a passenger in a boat with two other 16-year-olds when he either fell or jumped from the moving vessel, according to the KCSO. Alcohol is not believed to be a factor, according to the investigation.

A vigil was held Wednesday night for Nault at Ted Page Field at Coeur d'Alene High where Nault played baseball.

Miller said the KCSO is conducting a GPS grid search for Nault's body, "so it takes awhile."

He said a precise location of where Nault apparently jumped or fell in also would have helped, but was understandably difficult to obtain given the circumstances.

"Obviously having the most accurate last-seen point is critical to locating him since there is a lot of water in that area," Miller said, adding that such searches are generally "best guesses" based on witness accounts and 911 call data.

"All of this is generally very skewed since most people are not specifically looking for landmarks and using GPS locators. They end up self-searching for some time before we get called and by then, the area last seen is not very accurate, so searching takes more time."

There are other hurdles, Miller said.

The KCSO dive team does not dive with mixed gas, which is what is needed for a sustained deep-water dive. The team is advanced certified to 70 feet for sustained dive unless authorized for a deeper dive.

"The areas we are searching are as deep as 130 feet," Miller said. "For this, we would use our underwater remote operated vehicle (ROV) to verify and retrieve."

The ROV won't be used until a possible location is made with the sonar; otherwise it is not effective to randomly deploy it," Miller said.

Another piece of equipment that the KCSO has, but is not currently operational due to age, is an underwater sea scooter.

"It allows divers to cover more area quicker," Miller said.

Miller said private divers are discouraged at this point in the search due to search boats and other boaters active in the area.

"That would be an extreme hazard," he said.