For the fourth consecutive day continue the search with a sonar from Anna and Olivia, disappeared five weeks ago like his father, without at the moment any trace that could help find his whereabouts has been found, sources from the Civil Guard informed Efe.
The underwater robot that incorporates Ángeles Alvariño, the ship made available to the case by the Spanish Institute of Oceanography, has carried out several incursions after detecting protrusions in the subsoilEither some rock or garbage deposited on the seabed, but nothing related to the case.
In one of the cases the foreign object detected with the sonar was a garbage bag.
Search efforts on the seabed are proving very complicatedAccording to research sources consulted by Efe, the terrain is rocky and full of precipices.
The initial forecast is that the search will last between eight and nine days without interruption 24 hours a day.
For the moment, focuses on an area of about ten square miles, off the coast of Santa Cruz de Tenerife, which the ship of the Spanish Institute of Oceanography has been tracking since last Sunday.
The area, agreed by the Civil Guard and ship’s personnel, is the one delimited by the geopositioning of the mobile phone of the girls’ father, Tomás Antonio GC, who went to sea twice on the night of April 27, when he was lost the trail.
He embarked alone, without the company of the girls, and before he loaded suitcases and bags from his vehicle, for which he had to make three trips.
On his return from his first foray into the sea, he was intercepted by the Civil Guard and proposed for sanction for skipping the curfew.
The agents did not find anything suspicious in Tomás’ boat, since at that time the mother had not yet reported the disappearance of her daughters.
Then, after midnight, it set sail again and hours later the boat was found empty, adrift and without anchor in front of the Puertito de Güímar.
On board the Ángeles Alvariño there are always two agents of the Judicial Police of the Civil Guard, who direct the investigation, who take turns every few hours, since the search under the sea takes place day and night.
This oceanographic vessel carries out a multibeam probe survey with which, at a reduced speed, it carries out several passes over the same point, thereby increasing resolution.
The multibeam probe allows mapping with a precise bathymetry that will facilitate the subsequent work of the underwater robot, as stated in the information provided by the Civil Guard.
In this sonar prospecting work, parallel streets are established that overlap to cover the entire surface to be explored.
During this recognition, marks are established in the irregularities of the bottom that require a visual inspection a posteriori.
This inspection will correspond, if necessary, to the Liropus 2000 unmanned robot, with the capacity to operate and collect samples beyond 2,000 meters of depth, although if it is properly adapted it can work up to 3,000 meters.
It is equipped with a powerful lighting system with 17,000 lumens of power (17 times more than a 100-watt bulb), and high-performance cameras, one of them with high definition (HD format) and the other with very low luminosity.
For taking samples, it has two precision hydraulic manipulator arms for the collection of solid elements and a suction system for liquid and gaseous samples.
Eddie is an Australian news reporter with over 9 years in the industry and has published on Forbes and tech crunch.