The offshore marine services report starts
with the Vessels details and Background of the “Vessel A”
and “Vessel B”. It is followed by the details about the
incident that took place between the two vessels. Pursuant
to instructions received from Hull and machinery underwriters
of the vessel, Constellation Marine Surveyors immediately
proceeded to the port of incident to observe the damages.
Our Independent Marine Surveyors undertook
an inspection to ascertain the cause, nature and extent
of damage to “Vessel A” caused due to contact damage by
“Vessel B” and to oversee the repairs.
Upon boarding “Vessel A”, the marine inspectors noted
that the vessel had sustained damages to her port side hull
plating, main deck plating, hand railings and no. 1 ballast
tank air vent in way of frame 220-255 in the forward and
between frame no. 109-124 in mid ship.
On basis of visual inspection of “Vessel B”, the marine
inspectors could summarize the nature of damage was structural
damage to shell plating, internal strength members, main
deck plating and main deck hand railing in way of forward
deep tank and ballast tank air vent of forward deep tank
on port side.
The extent of damages was noted down, which included details
about the damages to Bulwarks plate and stays on port side,
port side railings, deck plate, shell plating.
Summary of some class surveyor points noted
during initial attendance:
- The NK class had advised the master of the subject vessel
to carry out temporary repairs on the indented and punctured
deck plating using tin sheet, canvas and cementing to a
thickness of 150mm.
- Considering the extent of damages sustained, the NK class
surveyor had recommended the vessel to proceed to dry dock
within the Persian Gulf region soon after the completion
of temporary repairs.
- The KR class surveyor for “Vessel B” had recommended that
the vessel is sea worthy and can proceed for scheduled voyages
but the permanent repairs were to be effected not later
that the due date of upcoming docking survey.
- As informed both the vessels were issued with memo from
the port harbor master and were asked to submit the following
documents:
* SOF
* Letter of indemnity, indemnifying the port for the accident.
* Sea Worthiness letter from the class for the vessel.
Some of the recommendations made by the
Constellation Marine Surveyors were as followed:
- Ships railings had collapsed in mid-ship and ford area
on the port side – to be renewed.
- Deck plate was buckled in the mid-ship and ford area portside
– to be renewed.
- Shell plate was indented in two locations – to be further
inspected and attended as required.
- Air vent head of ford deep tank was broken and distorted
cover – to be renewed.
The owners of the vessel planned to carry out permanent
repairs and had invited our attending surveyors to identify
the total extent of the damages as a result of the contact
incident. Following are some of the damages that were noted
and marked as per Class surveyor recommendations:-
- No. 1 port side ballast tank:
The tripping brackets between floor transverse and side
shell IWO Frames 219-223,226-227,234-235 over an area of
500x600x12 mm thickness was noted bent.
The shell plating and associated stiffeners between frame
no. 219 and 252 over an area 26.4m x 3.0m x 15mm thickness
was marked to be cropped and renewed.
- 2.No. 3 port side ballast tank:
The deep transverses IWO Frames 115, 121 and 133 was noted
dented and buckled and were marked to be cropped and renewed.
The floor transverse IWO Frames 111-115, 116-120, 122-124,
131 and 132 were noted buckled and to be cropped and renewed
as per Class NK
- 3.Forward port side deep tank:
The shell plating from Frames 252-255 over an area 2.4×3.0m
was noted dented inward.
All the associated stiffeners IWO the shell and main deck
plating were noted in order and to be saved as per Class
recommendations.
- 4.No. 1 cargo tank:
Two Nos. brackets IWO Frames No. 215 & 216 were noted bent.
The following are some of the remarks that were made by
the Class surveyor as part of the Class Maintenance inspection
and were confirmed during our independent surveyors attendances
onboard during the course of the permanent repair works:-
- 5.Upper Deck:
The buckled upper deck plates from Frame 220-300 mm to Fr
238-1100mm IWO No.1 top side tank(P) with Upper deck longitudinal
UL-19 to UL-22, brackets and reinforcement members were
cropped off and renewed.
- 6.Side Shell:
The buckled shear strakes plates from Frames 220 – 500mm
to Frames 255 + 200mm iwo No. 1 Top side (P) tank with side
longitudinal SL-1 and SL-2 brackets and reinforcement members
were cropped off and renewed.
- 7.Bulwark:
The bulwark plate from Frames 256-2000mm to Frames 256+2000mm
with bracket and stiffeners were cropped and renewed.
The buckled bottom plate of No. 1 TST from Fr.239-400mm
to FR.241+400mm was partially renewed.
- No. 1 Cargo hold:
The buckled hold frame (P) at fr.216 on the side shell was
partially renewed.
- No. 3 Top Side Tank:
The buckled transverse bracket plate on bottom plate of
No. 3 TST at Fr. 111 to Fr. 114, Fr.116 to Fr.120, Fr.123,
Fr.124, Fr.131 and Fr. 132 were partially renewed.
- Ship Side Hand Rails:
Damaged ship side hand rails around Fr 115 to 118 and Fr
220 to 255 were partially replaced.
- Panama chock:
Damaged panama chocks on port side at Fr.220 to 255 (4Nos)
were renewed.
The Report concludes with a Dry Dock Cost Review table
written by the Constellation Marine Surveyors. The table
consists of Item no, Invoice Description, Claimed amount
(USD), Remarks and Approved amount (USD).The report is of
51 pages and contains an appendix with 4 items