Concurrently with the meeting SafeChania 2015 (http://www.safechania2015.tuc.gr/5508.html), where the main results achieved so far in the IOSMOS project have been presented and discussed, an in-situ campaign to collect radiometric measurements using ASD FieldSpec Pro was carried out in the Gulf of Chania. Using the knowledge learned from the studies concerning the Ionian area, these measures will allow a better assessment of the quality of the satellite data in that area. In particular, measurements were acquired in collaboration with the staff of the TEIC, on 11 and 13 of June 2015..