1. The tanker is proceeding enroute. and
2. The instantaneous rate of discharge oil does not exceed 30ltr/nm and
3. The total quantity of oil discharged into the sea does not exceed for tankers deliver on or before 31 December, 1979. 1/15,000 of the total quantity of the particular cargo of which the residue formed a part. For tankers delivered after 31 December 1979- 1/ 30,000 of the total quantity of the particular cargo of which the residue formed a part and
4. The tanker has in operation an oil discharge monitories and control system and a slop tank arrangement as required by regulations 29 & 31 of MARPOL annex 1, respectively.
Discharging criteria diff b/w inside special area and outside special area?
Inside special area- The oil mixture is processed through an oil filtering equipment meeting the requirements of regulation 14.7 of the annex.
Outside special area – The oily mixture is processed through an oil filtering equipment meeting the req. of reg. 14 of this annex.
