启动时发动机MAP读数与大气压读数无差异。
No difference recognized between the engine MAP reading and the barometric (atmospheric) pressure reading at start-up.
注：采用任何轮胎气压表也可以检查ET膨胀罐气体压力的准确读数。
NOTE: To get an accurate reading when checking et Tank air pressure with any tire gauge either.
每小时记录气压计读数，并注意观察海况和风情。
Read and note the barometer every hour, and keep watch to seas and winds all the time.
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