Environmental Engineering Reference
In-Depth Information
BWE for tanks if these are not intended to be discharged, hence a higher number of
those BWE managed tanks would most likely be a mistake. However, as a conse-
quence of using BWMS (i.e., treatment of ballast water to meet the D-2 standard)
which treats ballast water on uptake, this would be a regular result. In case the
declared number of ballast water tanks managed is lower than the number of ballast
water tanks declared for the discharge, it is necessary to confi rm whether this is a
mistake or there are tanks with ballast water that need to be considered in the next
steps by the RA process. The numbers need to be compared as follows:
-
if the number of managed tanks is greater than the number of tanks declared for
the discharge, allow submission of BWRF with no further questions;
-
if the number of managed tanks is lower than the number of tanks declared for
the discharge, the vessel needs to correct this to have the same numbers, or
declare the tanks that have not been managed, but are to be discharged (i.e.;
Number of tanks to be discharged = Number of managed tanks to be discharged
+ Number of unmanaged tanks to be discharged). Should these BWRF entries
not match, then the BWRF should not be allowed to be sent or not be accepted
by the PSA.
Whichever BWM method has been declared, it should be confi rmed that tanks
declared for the discharge are those which were managed. The electronic system
can compare this automatically and act as appropriate.
The quantity of ballast water managed is to be compared with the quantity of
ballast water to be discharged. This is an analogue process, a comparison of the
number of ballast water tanks managed vs. the number of ballast water tanks
declared for discharge as described above. Hence, the same procedure is to be
applied using “quantity of ballast water” instead of “number of tanks”.
The number of ballast water tanks managed is to be compared with the number
of all tanks in ballast. The declared number of ballast water tanks managed in no
case can be greater than the number of all tanks in ballast. The electronic system can
compare these numbers automatically and does not allow a greater number of tanks
with managed ballast water compared to all tanks in ballast be entered in the BWRF
to be submitted.
The conducted BWM is to be compared with the data required elsewhere in the
BWRF. If a vessel has declared that it has already conducted BWM also stating the
BWM method used, there is a need also to report the number of managed tanks with
the quantity of ballast water managed, and if BWE was used as BWM method, it
needs to be reported where this was conducted. The BWM method declared and
further information requirements need to be related quantitatively, i.e., all fi elds
related need to be fi lled-in, and when possible also qualitatively.
Since this is a generic DSS model, it is expected that when it is applied, regional
and national specifi c requirements may result in a need to add different 'other' data
comparison requirements.
If a vessel reports satisfactory, then it enters the next phase of the DSS process,
in which she is being selected to enter the RA process.
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