The only contact between Dan and the external world was an intercom, during the long 61 days (nights)!
Marcelo Magon
System of Communication, two interlinked intercoms to a car battery!
This whole system was developed by Marcelo Magon, a genius of the electronics, through two cables of 180 meters and a car battery, was from within outside interlinked the intercoms of the cave.
For the communication between the camp and team expresses a system of radio communication it was installed by two intercoms and a recording personal computer of audio.
To confuse still plus, Jurandir always communicated with Dan in different schedules, it was also some days without communicating so that along the time Dan lost total it is controlled this hot or cold outside, if it was in the daytime or at night, even in the days in that the food was given the schedules they were several, Dan arrived in the first days to lose total notion of the time being several times wakened up by the bell of the intercom.

During everyday or " nights ", our adventurer was monitored daily by the ransom team where Jurandir Takes oath " it was him " being Dan Robson's guardian angel, and your diary was revised by Bacharelado in psychology Raimundo Fausto Lopes of the Universidade São Marcos.
Dan showed total it controls of your behaviors, but on the 8, 22, 35, Dan didn't get to contain your emotions and he/she cried in a total despair, lifting until the questionamento of your retreat of the cave to avoid larger damages in your personality, but thanks to God that was not necessary.
Jurandir, in contact with Dan, verifying your physical and psychological state
Jurandir asks for Dan that hours are, him this 11 hours already wandered

PROJECT PETAR61

Some years ago, he didn't pass of an analyst of systems, involved with hardware and computer science programs. Today the adventurer Dan Robson, years, of São Bernardo do Campo it collects feats as the one of having traveled to foot the whole Brazilian coast - from the Stream of Chuí, in Rio alone Great South until Oiapoque, in the boundary of Amapá with French Guiana - and the one of having inside after 61 days of a cave, experience that surrendered him/her the South American record in permanence in caves, until then belonging to a group of Brazilians that was 21 days in a grotto, in 1986, " as I traveled from Chuí to Oiapoque to foot I had knowledge of my physical limit, but was not sure that would get to be two months in a cave. I noticed that my psychological one is stronger than I imagined ", Dan Robson said - that for three times, he/she thought about giving the points during crises of momentary depression: he/she " Woke up crying without reason any, with an agony sensation, but soon it passed ".
The chosen place for Indiana Jones tupiniquim was the cave of Alambari of Top, belonging to Petar, in Iporanga (SP). The visitation is prohibited at the cave, and the victuals were given to the adventurer through a Tyrolese, so that he didn't have contact with other you be besides the bats and insects that inhabit the grotto, " in less than one week, I lost the notion of the time completely, So much that, in the day in that I was retired of the cave, they had me dictates that they still lacked ten days to complete the 61 days, and I believed,"
Besides the company of bats, Dan Robson arrived to be attacked by an otter to the edge of the river that goes by the interior of the grotto. With the fright, he lost the flashlight that was in your head and it was to the dark " Paras totally to find the hut again, I had to catch sand of the ground and to play for all the sides until hearing the noise of the grains beating in the canvas ".
Before beginning the taskwork, Dan Robson he/she had at least entered in a cave. " After I created the project, I visited five. A thing that called me attention was the insects. They are white, fragile, blind ".
Many of them only eat once a month. They are the bats that bring the food for them, because the feces of the bats create mushrooms that serve as food for the insects ".

Communication, two interlinked intercoms to a car battery