Its more bureaucratic excercising. When some months ago NATO announced that it would increase the alarm level of its interceptor patrol in the Baltic, it only meant that they would continue with already scheduled training flights that already were running at that time.
And when German airforce announced that they would contribute to that "increased" NATO presence by sending aircraft, that only meant that they sent I think 4 or 6 airplanes that served as training targets for the NATO fighters exercising there, and after being "shot" down as planned, returned to German bases.
The Baltic Sea I would expect to already be under tight NATO surveillance by submarines, mainly German ones. The Baltic is Germany's primary naval focus within the framework of NATO doctrine and scenarios focussing on the USSR/Russia.