hatchway
3.In case the space is not enough ,you can use one more section in the hatchway ,but leave a small margin.
4.The engine hatchway noise level of the main types of fighter aircraft in our country ranged from 117 to 130 dB(A), while the maximum engine hatchway noise of J-8D exceeded 140 dB(A). This is far beyond stipulate criteria for protection of hearing home and aboard, that is the noise should not exceed 115 dB(A) for naked ear noise exposure.
5.According to IMO code of safety practice for ships carrying bulk grain, the grain heeling model was established for non-special grain vessels, and the calculation method of grain heeling volumetric moment was put forward for full compartments of non-special grain vessels with detailed illation of calculating formulae of grain heeling volumetric moment for hatchway and around hatchway.
