The article simulates Twin Paradox by means of floating boats. The boats are fitted with a pendulum clock and instruments activated by signals generated by this clock (in time with this clock). The function of the clock pendulum is performed by a high-speed shuttle continuously moving along a vertical (relative to the boat) line between the boat and the bottom. The article demonstrates, that even if two boats are sailing side by side at a speed v relative to the water, then one of them halts, waits for a while and then catches up with the boat sailing ahead, the instruments on the non-inertial boat grew less old than on the inertial one.
Abstract ‘Transcending Relativity’ explains how the possibility of instantaneous signalling requires us to revise our ideas about the relativity of time. We begin with a sketch of relativity theory in its historical context, and we explain why instantaneous signals are usually regarded as paradoxical (potentially leading to signals travelling ‘backwards in time’). We trace the paradox to certain assumptions about how distant clocks are to be synchronised using light signals. If instead clocks are synchronised using instantaneous signals, there is no paradox. We then have a preferred time and a preferred state of rest, as in Lorentz’s original (pre-Einsteinian) view of relativity physics. The chapter ends with a discussion of how this picture makes sense according to the internal logic of pilot-wave theory.