When the sea conditions are not exactly calm, how will you make sure that the ullage measurement reading is closer to accurate?
Direct Answer
Option C: For each tank, take 5 ullage measurements, leave the maximum and minimum values, then average the remaining three values and apply trim correction
To ensure accurate ullage readings in rough seas, take multiple measurements, discard the highest and lowest, and average the remaining three. Applying trim correction to this averaged value minimizes the impact of vessel motion, as recommended in P&A Manual procedures.
All Options
Detailed Explanation & Context
To ensure accurate ullage readings in rough seas, take multiple measurements, discard the highest and lowest, and average the remaining three. Applying trim correction to this averaged value minimizes the impact of vessel motion, as recommended in P&A Manual procedures.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).
Practice Full CHEMCO Set 9
Test yourself with 30 interactive questions, live timer, and instant score.