In an ordinary On / Off Hire Bunker Quantity Survey examination the main intention is to find out actual fuel capacity on board with deep sounding method. Then compared with Tank Sounding Booklets if sounding amount and m3 calculations given us the reality or not. Same double check method can be applied for ullaging method also. Then secondary comparison should be carry out by checking the difference between actual daily consumption which declared in E/R Logbook and Charter Party agreement.