What is the meaning Marsec Level 1?

Minimum appropriate security measures shall be maintained at all times at MARSEC Level 1. As a result of heightened risk of a transportation security incident, additional protective security measures will be maintained at MARSEC Level 2.MARSEC Level 1 is the level at which the appropriate minimum safety measures must be maintained at all times. MARSEC Level 2 is the level at which the appropriate additional safety measures must be maintained for a period of time due to the increased risk of an accident in the field of transport safety.