The temperature measurement system on bord of the R.V. Polarstern is an autonomous system to record the temperature distribution of the ship's structure. For this purpose, 16 locations in the void spaces 92 and 100 at starboard side between frame 78 and frame 81 are instrumented with PT1000 temperature sensors. The sensors are installed on the outer shell, frames and on deck 1 (E-Deck) and deck 2 (F-Deck). To ensure a long run time with limited memory, only one data set is stored every five minutes by Driesen+Kern data loggers.