Three variants, one endorsement, and the cargo-transfer questions that decide whether you sign the Declaration of Inspection.

The Tankerman-Person In Charge endorsement, regulated under 46 CFR Part 13, is the USCG credential that allows a mariner to supervise the transfer of liquid cargo or liquefied gas on a tank vessel. It is also one of the most consequential endorsements a deck officer can hold: the Tankerman-PIC signs the Declaration of Inspection (DOI) before transfer, and that signature carries personal legal liability for every drop spilled, every vent opened at the wrong pressure, and every tank entered without proper atmospheric testing. MMCE.app's Tankerman-PIC module drills the three 46 CFR 13 variants — Barge, Dangerous Liquid, and Liquefied Gas — so candidates can sit any of the three exams cold.

What the exam actually tests

The Tankerman-PIC exam tests procedural knowledge you will execute every single transfer: pre-transfer conference content, DOI completion, inert-gas system verification, pressure-vacuum valve settings, cargo-pump start-up and shutdown sequences, emergency shutdown (ESD) logic, confined-space entry permit procedures, and spill-response actions under the Vessel Response Plan (VRP). Questions are scenario-based and specific: given a crude-oil cargo at 65 °C and a shore-side flowrate of 6,000 bbl/hr, what is the correct topping-off sequence? Given an IG O2 reading of 6%, can you continue loading?

Which credentials test this

• USCG — Tankerman-PIC (Barge) 46 CFR 13.201, Tankerman-PIC (Dangerous Liquid) 13.203, Tankerman-PIC (Liquefied Gas) 13.205; Tankerman Assistant and Tankerman Engineer endorsements share overlapping content
• MCA — Specialist Tanker Training (Oil, Chemical, LNG) at Basic and Advanced levels under STCW V/1-1 and V/1-2
• Transport Canada (TC) — Specialized tanker training certificates (Oil, Chemical, Liquefied Gas)
• AMSA (Australia) — STCW V/1-1 and V/1-2 tanker endorsements
• DG-IN (India) — Oil Tanker Familiarization and Advanced training, Chemical Tanker, LNG tanker courses under STCW V/1
• Maritime NZ (MNZ) — Tanker familiarization and specialized endorsements
• MARINA (Philippines) — STCW-aligned tanker certificates
• RMI — Flag-state tanker endorsements built on any of the above

Core subject-matter breakdown

• Inert gas (IG): purpose (O2 below 8% prevents flammable atmosphere), flue-gas vs IG generator vs nitrogen, IG main and deck isolating valve, deck water seal, non-return valve, pressure-vacuum breaker, IG P/V settings and alarms
• Crude oil washing (COW): MARPOL Annex I regulations, tank-washing machine patterns (top/bottom/side), COW programme, safety requirements (O2 below 8%, positive IG pressure)
• Cargo pumps: centrifugal vs reciprocating vs screw pumps, deepwell and submerged pumps for chemical and LNG, NPSH, cavitation, discharge-pressure limits
• Pressure-vacuum (P/V) valves: setting, testing, the role of the mast riser and high-velocity vent, importance of not overriding
• IG system components: scrubber, blower, deck seal, P/V breaker, dedicated IG generator for chemical/product tankers
• Tank entry (confined space): atmospheric testing (O2 minimum 20.9%, hydrocarbons below 1% LEL, toxics below TLV), entry permit, standby person, rescue equipment, continuous monitoring
• Transfer procedures: pre-transfer conference (14 topics under 33 CFR 156.120), DOI signing, declaration of loading plan, ESD test, topping-off, line-stripping and blowing
• Declaration of Inspection (DOI): 33 CFR 156.150, who signs, what is inspected, retention requirements
• Emergency response: spill containment, SOPEP and VRP activation, Qualified Individual notification, NRC (National Response Center) reporting
• Variant-specific content: Barge (tank-barge-specific pumping and mooring), Dangerous Liquid (chemical compatibility, USCG Chemical Data Guide), Liquefied Gas (cryogenic PPE, cargo containment systems A/B/C, boil-off gas handling)

Common pitfalls & traps

The classic DOI trap: candidates assume the PIC on the vessel signs alone, but 33 CFR 156 requires signatures from both the vessel PIC and the facility PIC, and both must complete the checklist independently. Another pitfall: O2 thresholds — 8% for IG system operation, 20.9% for tank entry. Candidates mix them up and end up sending a crew into a 9% atmosphere. A third: pressure-vacuum valves are sealed for a reason, and operational staff must never bypass them to gain faster venting — doing so removes the last barrier between cargo-tank pressure and atmosphere. On chemical tankers, the compatibility matrix in the USCG Chemical Data Guide is load-bearing; candidates who rely on memory rather than consulting the guide routinely pick the wrong segregation.

How MMCE.app prepares you

MMCE.app's Tankerman-PIC module contains questions tagged by 46 CFR 13 variant (Barge, DL, LG), so candidates sitting the Liquefied Gas exam get LNG-specific cryogenic questions instead of crude-oil topping-off questions. Each variant has its own IRT theta tracked separately. The AI tutor explains not just the correct answer but the underlying regulation citation — 33 CFR 155 (pollution prevention), 33 CFR 156 (transfer operations), 46 CFR 13 (endorsement requirements), 46 CFR 35 and 153 (tankship operations). Pass threshold is 70%.

Related credentials on MMCE.app

Tankerman-PIC overlaps heavily with MARPOL Annex I and II, Ship Stability (free-surface on partially loaded tanks), Firefighting (deck foam systems, foam monitors), and Cargo Operations for Chief Mate / Master. MMCE.app candidates stacking Tankerman-PIC on top of a Mate or Master licence get one integrated study plan that covers both tracks.