33 CFR §104.285

1. (a)General.
   1. (1)The vessel owner or operator must ensure the implementation of security measures and have the capability to continuously monitor, through a combination of lighting, watchkeepers, security guards, deck watches, waterborne patrols, automatic intrusion-detection devices, or surveillance equipment, as specified in their approved Vessel Security Plan (VSP), the—
      1. (i)Vessel;
      2. (ii)Restricted areas on board the vessel; and
      3. (iii)Area surrounding the vessel.
   2. (2)The following must be considered when establishing the appropriate level and location of lighting:
      1. (i)Vessel personnel should be able to detect activities on and around the vessel, on both the shore side and the waterside;
      2. (ii)Coverage should facilitate personnel identification at access points;
      3. (iii)Coverage may be provided through coordination with the port or facility; and
      4. (iv)Lighting effects, such as glare, and its impact on safety, navigation, and other security activities.
2. (b)Maritime Security (MARSEC) Level 1. At MARSEC Level 1, the vessel owner or operator must ensure the implementation of security measures, which may be done in coordination with a facility, to:
   1. (1)Monitor the vessel, particularly vessel access points and restricted areas;
   2. (2)Be able to conduct emergency searches of the vessel;
   3. (3)Ensure that equipment or system failures or malfunctions are identified and corrected;
   4. (4)Ensure that any automatic intrusion detection device sets off an audible or visual alarm, or both, at a location that is continuously attended or monitored;
   5. (5)Light deck and vessel access points during the period between sunset and sunrise and periods of limited visibility sufficiently to allow visual identification of persons seeking access to the vessel; and
   6. (6)Use maximum available lighting while underway, during the period between sunset and sunrise, consistent with safety and international regulations.
3. (c)MARSEC Level 2. In addition to the security measures required for MARSEC Level 1 in this section, at MARSEC Level 2, the vessel owner or operator must also ensure the implementation of additional security measures, as specified for MARSEC Level 2 in the approved VSP. These additional security measures may include:
   1. (1)Increasing the frequency and detail of security patrols;
   2. (2)Increasing the coverage and intensity of lighting, alone or in coordination with the facility;
   3. (3)Using or increasing the use of security and surveillance equipment;
   4. (4)Assigning additional personnel as security lookouts;
   5. (5)Coordinating with boat patrols, when provided; and
   6. (6)Coordinating with shoreside foot or vehicle patrols, when provided.
4. (d)MARSEC Level 3. In addition to the security measures for MARSEC Level 1 and MARSEC Level 2, at MARSEC Level 3, the vessel owner or operator must ensure the implementation of additional security measures, as specified for MARSEC Level 3 in the approved VSP. These additional security measures may include:
   1. (1)Cooperating with responders and facilities;
   2. (2)Switching on all lights;
   3. (3)Illuminating the vicinity of the vessel;
   4. (4)Switching on all surveillance equipment capable of recording activities on, or in the vicinity of, the vessel;
   5. (5)Maximizing the length of time such surveillance equipment can continue to record;
   6. (6)Preparing for underwater inspection of the hull; and
   7. (7)Initiating measures, including the slow revolution of the vessel's propellers, if practicable, to deter underwater access to the hull of the vessel.