The DEEP DRILLER, while loaded as shown in the Sample Load Form #4 (Drilling), suffers damage to the starboard forward column below the waterline. Pumping from tank 2S and 3S is not sufficient to prevent increasing starboard list and bow down trim. You should consider counterflooding in tank __________.
• Damage stability and counterflooding – using water on the opposite side to reduce list and sometimes help trim • Reading the Sample Load Form #4 (Drilling) to locate each tank by side (P/S), longitudinal position (fore/aft), and vertical height • Effect of trim (bow down / stern down) and how adding weight forward or aft changes it
• On the load form, which candidate tank is on the opposite side from the damage and will most effectively oppose a starboard list? • The vessel is bow down. Of the listed tanks, which one(s) are located more aft so that taking water there would help bring the bow up? • When you counterflood, how do you balance the need to correct list and trim against the negative effects of adding weight and free surface?
• On Sample Load Form #4, positively identify for each option whether the tank is port, starboard, or centerline, and whether it is forward, midships, or aft • Check the current contents and sounding of each candidate tank on the form – is it available to be counterflooded, and will flooding it create excessive free surface? • Verify which tank’s location (side and fore‑and‑aft) best opposes both the starboard list and bow-down trim simultaneously.
No comments yet
Be the first to share your thoughts!