# Inspect, test, calibrate, and repair maritime-security systems on schedule > Use 33 CFR 105.250 -- Maritime Security: Facilities to review this narrow operational decision without extending the source beyond its stated scope. - Canonical URL: https://update.dsesecurity.com/updates/inspect-test-calibrate-and-repair-maritime-security-systems-on-schedule/ - Publisher: Detection Systems & Engineering (DSE Security) - Author: DSE Security Editorial Team - Published: 2026-08-27T12:11:12+00:00 - Modified: 2026-08-27T13:09:37+00:00 - Last reviewed by DSE: 2026-08-26 - Resource type: Guide - DSE priority: Advisory - Topics: Access Control, Business Continuity, Cybersecurity - Reading time: 3 minutes ## What you need to know Use 33 CFR 105.250 -- Maritime Security: Facilities to review this narrow operational decision without extending the source beyond its stated scope. ## Potentially affected Teams, systems, services, or facilities within the stated scope of 33 CFR 105.250 -- Maritime Security: Facilities ## DSE recommendation Compare the observed state with the cited official source, document applicability and exceptions, and test any approved change with rollback safeguards. ## Article Use this document to connect an official requirement or behavior to observable evidence: Inspect, test, calibrate, and repair maritime-security systems on schedule. Only the official source and traced locations below supply facts. Confirm applicability before acting. ## Source fact: The official [33 CFR 105.250 — Maritime Security: Facilities](https://www.ecfr.gov/current/title-33/section-105.250) from U.S. Coast Guard via eCFR supports the following bounded statements: - Under 33 CFR 105, the rule requires that security systems and equipment be in good working order and inspected, tested, calibrated, and maintained according to manufacturers’ recommendations. The research record locates this support at 33 CFR 105.250(a) (eCFR anchor p-105.250(a)). - Under 33 CFR 105, the rule requires that security systems be regularly tested in accordance with the manufacturers’ recommendations; noted deficiencies corrected promptly; and the results recorded as required in section 105.225 of this subpart. The research record locates this support at 33 CFR 105.250(b) (eCFR anchor p-105.250(b)). Keep the evidence boundary at these traced claims. They support a review of critical rooms, power, cooling, water, fire protection, alternate sites, physical barriers, and documented recovery paths; they do not support conclusions outside the source’s stated conditions. ## What the source does not establish Applies only to facilities within 33 CFR part 105 and the cited section. Confirm Coast Guard jurisdiction, the approved Facility Security Plan, the current MARSEC level, and any approved alternatives; this is not legal advice or a universal facility-design standard. No current deployment state or change approval follows from the source alone. Validate identity and access control, Windows DNS where networked services use it, time, communications, utilities, life-safety systems, vendors, and authorized responders, and treat examples or options as conditional inputs rather than defaults. ## Applicability questions - For source statement 1 at 33 CFR 105.250(a) (eCFR anchor p-105.250(a)), which observable configuration, record, or test can confirm applicability here? - For source statement 2 at 33 CFR 105.250(b) (eCFR anchor p-105.250(b)), which observable configuration, record, or test can confirm applicability here? - Which owner can attest to the recorded state of critical rooms, power, cooling, water, fire protection, alternate sites, physical barriers, and documented recovery paths, including exceptions? - What baseline for identity and access control, Windows DNS where networked services use it, time, communications, utilities, life-safety systems, vendors, and authorized responders must accompany the source-specific observation? - Which success, stop, and escalation criteria are written before testing begins? ## DSE recommendation: DSE recommends using the cited source as the evidence anchor for this decision. Anchor the review in the cited section and keep observation separate from interpretation. Record the source location, examined part of critical rooms, power, cooling, water, fire protection, alternate sites, physical barriers, and documented recovery paths, observed and expected states, owner, and reason for deviation. Do not move from citation to production in one step. Pilot the decision where practical, observe agreed signals, retain a reversal point, and verify identity and access control, Windows DNS where networked services use it, time, communications, utilities, life-safety systems, vendors, and authorized responders. Handle credentials, keys, recovery data, and personal information through approved secure channels. ## Verification and evidence Evidence should let another reviewer reproduce this decision. Retain observations beside the traced locations 33 CFR 105.250(a) (eCFR anchor p-105.250(a)); 33 CFR 105.250(b) (eCFR anchor p-105.250(b)). Favor facility inventories, inspection records, alarm and shutdown tests, maintenance history, recovery exercises, and corrective actions, linked to stable identifiers, time, and operator. Record the decision even when no change is made, including uncertainty and the next trigger. Use safe testing conditions for disruptive work, preserve rollback proof, and revisit the conclusion after relevant platform, dependency, vendor, or ownership changes. ## Official references - [33 CFR 105.250 — Maritime Security: Facilities](https://www.ecfr.gov/current/title-33/section-105.250) — U.S. Coast Guard via eCFR ## Primary reference - Name: 33 CFR 105.250 -- Maritime Security: Facilities - Authority: www.ecfr.gov - URL: https://www.ecfr.gov/current/title-33/section-105.250 - Source publication date: Not stated by the source ## Citation and use Preferred citation: “Inspect, test, calibrate, and repair maritime-security systems on schedule,” DSE Security, https://update.dsesecurity.com/updates/inspect-test-calibrate-and-repair-maritime-security-systems-on-schedule/ Publishing principles: https://update.dsesecurity.com/updates/dse-updates-editorial-methodology/ Usage and citation policy: https://update.dsesecurity.com/usage/ Copyright © 2026 Detection Systems & Engineering. 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