A buoy replaces my sunken raft in the systems used in both the Atlantic and the Pacific oceans. The main improvement of this system is however, the use of a Pressure to SONAR Transponder on the sea floor to sense the ocean swell.
One immediate benefit of this system is the reduction in the power required for the SONAR signal, as the SONAR pulses now only have to travel half the distance they had to travel in my system. A second benefit is the direct translation of the swell's existence into useful information.
The satellite sends the pressure data to a centralized data processing center where it is combined with similar data from other "Sonobuoys" to get a complete picture of the ocean swell. From this center, warnings are sent out to the regions that will be affected by the detected swell.
Now the weakness of the systems used in both the Atlantic and Pacific, is that the centralized processing center has to serve many nations. Around the Indian Ocean, some of the nations are at war with eachother. Such nations feel at risk in trusting foreign interests to provide them with ample warning. After all, only one enemy agent needs to infiltrate the processing center in order to do you real harm. This is where my system is a decided improvment. An off-shore swell will decidedly affect the surrounding shores, so a complete picture of the entire swell is not required in order to realize a tsunami is on its way.