/ ship salvage
Assistance in Salvage, and simulation of refloating scenarios,
and hull stress monitoring
Over the years, Triton has assisted SMIT
INTERNATIONAL BV, the South African Office, formally known as
PENTOW MARINE, SVITZERWIJSMULLER,
POSH SEMCO, ARDENT
SUBTECH and RESOLVE SALVAGE,
on a number of salvage projects.
Generally our involvement takes the form of the resident
Naval Architect, working alongside the salvage Master, and responsible
for the ship stability, calculation of grounding forces, investigation
of deballasting or discharge simulation for refloating purposes whilst
ensireing safe hull stresses.
In some cases onboard hull stress monitoring has
been implemented for the duration of the stranded period, in which
live stresses are measured and monitored, using strain gauging techniques.
In Sept 2016 we assisted ArdentSubtech
in the refloat calculations for the salvage of the M.V. Macuti,
off Mozambique, and in Nov 2016, we acted for Resolve Salvage
and Fire, for the vessel VERONA which burnt
out in Table Bay Harbour.
During 2011 Christo attended to the attempted salvage
operation of the MS Oliva which ran aground at Tristan
da Cunha, and later in the year the sucessful salvage of the PHOENIX
off the Durban north coast. For the latter, Christo undertook the
full simulation of the flooded vessel as grounded, in waves, thereby
simulating the calculation of the grounding reactions for the effects
of waves and tides, whilst partially flooded, using GHS software.
The predicted conditions and the conditions expereinced during the
eventual pull off were in close correlation.
During 2010 Triton again used their GHS software
to simulate the righting forces required to right the fishing trawler
LAVERNE, which had capsized alongside in Cape Town Harbour. In this
case we assisted SMIT and SVITZER in their preparation of the proposed
Priot that examples include the salvage operation
in refloating of the Bulk Carrier LONG CHARITY, after
she ran aground in Aug 2009, in the mouth of Saldanha Bay. Triton
were called in to assist SVITZER.
The most recent salvage operation was the Barge
MARGARET, carrying 12 Inland Barges and 2 Docks that broke
tow and ran aground off Jacobsbaai in June 2009. Triton were called
in to assist POSH SEMCO of Singapore.
Other prominant of local salvage projects include
the successfull refloating of the bulkcarrier "Ikan Tanda"
in 2001, off Scarbourough, and in 2003, the successful refloating
of the 250m containership "Sealand Express"
off Sunset Beach in Table Bay.
Other salvage projects have also been undertaken,
for example, In 2002 we were involved in a tanker salvage operation
off Algeria (where "Name" ship went aground
and broke in two), were we prepared the salvage plans to float off
the two halves independently. Again in 2002, we were the resident
Naval Architects on a tanker salvage in the Red Sea, (where the "Name"
was severely damaged due to an explosion with severe loss of mid ship
strength) were we performed the very delicate transshipment calculations.
In years prior to this Triton, had been involved
as the Naval Architect in the salvage operations of the vessels "Pacificos",
"Mimosa", "Atlas Pride", "Katina
P" and "Tochal'.
With the use of the powerful GHS
suite of software (from Seattle, WA, USA), we can simulate ships in
any condition of flooding, whether afloat or aground, whether upright
or inverted with trapped air. We can model effects of tank spaces
filled with dual contents, for instance fuel and seawater, through
partial flooding, seawater and trapped air etc. We can also simulate
these effects with windage, with stability on waves, with grain shift,
spilling tanks, and various other possible scenarios, all the while
calculating the longitudinal strength at any location.
Triton Naval Architects
No. 8 Foregate Square,
Foreshore, Cape Town, SOUTH AFRICA
Tel: +27 21 418 2090 | Fax:
+27 21 425 2722 | Email: email@example.com
By Triton Naval Architects