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APPENDIX B
Maritime Security (MARSEC) Levels
Maritime Security (MARSEC) levels are called for in 33 CFR 101.200 to increase security of
facilities and vessels based on an increase in threats that could impact the maritime industry. All
vessels and facilities that must meet 33 CFR 104 and 105 or SOLAS requirements must have
approved plans for increasing MARSEC levels. MARSEC levels provide guidance to the maritime
community and to the public of the level of risk to the maritime elements of the national trans-
portation system. As stated in 33 CFR 101.205, MARSEC levels parallel the Department of
Homeland Security (DHS) Homeland Security Advisory System (HSAS), which is designed to
target protective measures when specific information to a specific sector or geographic region is
received. The relationship between MARSEC and HSAS threat levels is shown in Table B1.
The mandatory requirements of MARSEC level 1 for vessels and terminals are listed in 33 CFR
104 and 105, respectively. MARSEC levels 2 and 3 are considered guidance and only applicable
if they are contained in a U.S. Coast Guardapproved vessel or facility security plan. An example
of various MARSEC levels and protective measures is shown in Table B2. The system is designed
such that MARSEC level 1 protective measures are accomplished at the lowest security levels.
Under increased security threat, MARSEC level 2 protective measures are accomplished in addi-
tion to those of Level 1, and so forth. Specific MARSEC level security measures annotated in
Table B2 are generic. Actual protective measures employed within individual facilities are con-
sidered sensitive security information. The Captain of the Port (COTP) has the legal authority
to increase or decrease MARSEC levels that may differ from HSAS levels based on intelligence
for certain geographic areas and selective targeting of maritime interests. Additionally, when
Table B1. Relationship between MARSEC levels
and the HSAS levels (from 33 CFR 101.205).
Homeland Security Advisory System
Maritime Security
(HSAS) Threat Condition Level and
(MARSEC) Level
Corresponding Color
Low Green
MARSEC 1 Guarded Blue
Elevated Yellow
MARSEC 2 High Orange
MARSEC 3 Severe Red
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Appendix B: Maritime Security (MARSEC) Levels 55
Table B2. Example MARSEC levels and corresponding protection measures.
Measure MARSEC 1 MARSEC 2 MARSEC 3
Coordinate security needs and
procedures and agree upon
Declaration of Revisit DoS effective period
contents of the Declaration of No action.
Security to 30 days.
Security (DoS). A DoS can be
effective for up to 90 days.
Enforce access control Enforce MARSEC 1 Enforce MARSEC 1 and 2
Access Control procedures. Randomly screen protocols. Increase screening protocols. Screen everyone
and Screening for dangerous substances and rate and detail for dangerous extensively for dangerous
devices. substances and devices. substances and devices.
Enforce MARSEC 1 and 2
Enforce MARSEC 1
protocols. Restrict access to
Restricted Designate and post restricted protocols. Increase intensity
additional areas, prohibit
Areas areas. Restrict access to areas. and frequency of monitoring
access to areas, and search
access controls to areas.
areas.
Segregate checked persons
and personal effects from the
Enforce MARSEC 1 and 2
Additional unchecked. Pre-screen a
Enforce MARSEC 1 protocols. Assign additional
Passenger percentage of loaded vessels.
protocols. Increase intensity security force personnel to
Ferry Facility Deny access to restricted
of public area monitoring. monitor the public access
Requirements areas. Provide security
area.
monitors in public access
areas.
Enforce MARSEC 1 and 2
Check cargo and cargo spaces Enforce MARSEC 1 protocols. Suspend loading
prior to and during handling. protocols. Increase frequency operations. Cooperate with
Cargo
Match cargo documentation of cargo and cargo space other maritime entities in
Handling
with shipping information. checks, documents, and area. Verify inventory and
Screen specified vehicles. specified vehicle screenings. locations of hazardous
materials on board vessel.
Check stores for integrity. Enforce MARSEC 1 Enforce MARSEC 1 and 2
Delivery of Decline accepting protocols. Check before protocols. Enhance checking
Stores and stores/bunkers without being accepting stores/bunkers of stores. Restrict delivery of
Bunkers pre-ordered or pre-inspected. immediately upon arrival on- stores/bunkers. Refuse to
Deter tampering with stores. board. accept stores on-board.
notified of an increase in MARSEC levels by the COTP, the company must notify the COTP,
within a reasonable time, that the company's facilities and vessels have attained the specific MAR-
SEC level security.
Alternate security protective measures can be applied, as necessary, to counter a recognized
deficiency or a threat. Vessel or facility owners or operators can implement such action immedi-
ately; they do not have to wait for approval or written authorization from the COTP when imme-
diate action is necessary. However, the necessary communication between vessel and facility
owners or operators should be followed up immediately through the use of administrative
requests, justifications, or letters.
