Extended Operational and Trade Vocabulary
Marine Surveying and Inspection glossary (page 3)
The surveys and inspections that verify a vessel’s condition and a cargo’s quantity: classification and statutory surveys, acceptance and on/off-hire surveys, draft surveys, damage and abandonment surveys, and the survey reports they produce. Covers the IACS class societies as survey authorities and the surveying methods that underpin claims, charter delivery, and cargo settlement.
560 defined terms.
Showing 60 on this page (page 3 of 3).
T
- Thermal Imaging Survey
- Use of IR camera to detect hotspots on machinery or insulation.
- Thickness Measurement (TM)
- Ultrasonic thickness gauging by approved firm.
- Tightness Test
- Verification of weather and water tightness of closures.
- Tonnage Certificate
- Statutory certificate of gross and net tonnage.
- Topside Tank Inspection
- Close-up survey of topside ballast tanks in bulk carriers.
- Total Calculated Volume (TCV)
- GSV plus free water in petroleum quantity calculations.
- Total Observed Volume (TOV)
- Total volume in tank at observed temperature.
- Trace Sample
- Small sample for tracing source of contamination.
- Trial Trip Witness
- Surveyor attendance at builder's trial voyage.
- Trim Correction
- Correction applied for vessel trim during draft survey.
- Triple Point Sample
- Petroleum sample drawn at upper, middle, and lower depths.
- Type Approval Verification
- Confirmation that installed equipment is type approved.
U
- Ullage
- Empty space above liquid cargo in a tank.
- Ullage report
- Pre- and post-transfer record of ullages in delivering and receiving tanks.
- Ullage Survey
- Quantity determination using ullages on liquid cargo or bunker tanks.
- Ultrasonic Thickness Gauging (UTG)
- NDT method measuring plate thickness via ultrasonic pulse echo.
- Underwater Hull Inspection
- Diver inspection of submerged hull and appendages.
- Underwriter's Surveyor
- Surveyor instructed by hull or cargo underwriters.
- Uniform Gauging Pattern
- Class accepted gauging pattern on plating and stiffeners.
- Unloading Plan Audit
- Review of bulk carrier loading plan to BLU Code limits.
- Untreated Ballast Test
- Sample analysis confirming BWMS bypass non-compliance.
- Updated Drawings Verification
- Confirmation that as-built drawings on board are current.
V
- VAC Sample (Vacuum Sample)
- Tank residue sample used in cargo investigations.
- Vacuum Box Test
- NDT method for weld tightness verification using a vacuum box.
- Vapor Emission Control Survey
- USCG and class verification of vapor recovery systems.
- Vapor Lock Sample
- Tanker sample drawn through vapor lock without opening tank.
- VCF (Volume Correction Factor)
- Factor correcting petroleum volume to 15 degrees C.
- Vessel Particulars Verification
- Confirmation of LOA, beam, GT, NT, and DWT.
- Vetting Inspection
- Tanker SIRE or CDI inspection on behalf of charterers.
- Vibration Survey
- Measurement of vibration on machinery and structures.
- Visual Examination
- Initial method of survey using sight aided by lighting and access.
- Voids Inspection
- Examination of void spaces for tightness and corrosion.
- Voluntary Thickness Reduction
- Owner accepted thickness reduction within class allowable.
- Voyage Charter Survey
- Cargo or condition survey under a voyage charter.
- Voyage Data Recorder (VDR) Annual Performance Test
- Independent test of VDR functionality.
W
- Wall Wash Test
- Methanol or solvent test for cleanliness in chemical tanker tanks.
- Wastage Allowance
- Allowable reduction of scantling thickness in class.
- Water Bottom Sample
- Sample drawn at tank bottom to detect free water.
- Water Cut
- Measurement of free water in petroleum cargo using water finding paste.
- Water Finding Paste
- Color changing paste applied to tape for free water detection.
- Water Ingress Detection System Test
- Functional test of hold and forepeak alarms on bulk carriers.
- Watertight Door Test
- Operational test of watertight doors and indicators.
- WCF (Weight Correction Factor)
- Factor converting petroleum volume to weight.
- Weather Damage Survey
- Investigation of damage caused by heavy weather.
- Weather Tight Closure Test
- Hose or chalk test of weather tight closures.
- Weatherdeck Inspection
- Examination of main deck, hatches, vents, and outfit.
- Welding Procedure Review
- Verification of WPS and welder qualifications for class repairs.
- Wet Hatch Survey
- Investigation of water ingress through hatch covers.
- Wet Test (Hose Test)
- Hatch cover and weatherdeck hose testing.
- Winch Brake Holding Test
- Mooring winch brake holding capacity test per OCIMF MEG4.
- Wire Rope Inspection
- Visual and dimensional inspection of wire ropes and terminations.
- Witness Surveyor
- Surveyor attending operations to witness and certify events.
- Working Aloft Inspection
- Inspection of safety arrangements for work at height.
- Wreck Survey
- Inspection of wreck for removal feasibility and salvage.
X
- X-Ray Inspection
- Radiographic NDT method for weld root and internal defects.
Y
- Yard Survey
- Class attendance at shipyard during newbuild or repair.
- Yokohama Fender Inspection
- Examination of pneumatic fenders for STS operations.
Z
- Z Test (Z 10.4)
- IACS Recommendation 76 reference Z survey programme for bulk carriers.
- Zinc Anode Inspection
- Visual and weight assessment of sacrificial zinc anodes.
- Zone Survey
- Inspection by hazardous area zone classification under IEC standards.