A method of making a thin film explosive detonator includes forming a substrate layer; depositing a metal layer in situ on the substrate layer; and reacting the metal layer to form a primary explosive layer. The cryopreservation device stores specimens within a preservation chamber. The heating element comprises powdered aluminum, calcium oxide, calcium carbonate, calcium dihydroxide, sodium carbonate and sodium hydroxide that is reacted with water in a two stage chemical reaction to create heat within the heating bag. Furthermore, it no needs to know the changed value of received signal amplitudes and the differential two-level amplitude-shift-keying signals can be demodulated by just detecting whether the amplitude of the received signal is changed. By means of the machinery of the vessel, which preferably comprises azimuth propellers, the direction of the anchor line is adjusted and so is the orientation of the vessel relative to the anchor line to the effect that then propellers can be used to crush and dispose of the ice without using energy to hold the vessel up against the pressure of the ice. In one embodiment, the cabinet may be a heating, ventilation and air conditioning system cabinet.