DIARY OF OPERATIONS

• 2004-03-31 Arrival in Punta Arenas of Italian Team from Bologna and Parma and SHOA.
• 2004-04-01 Mobilization on board
• 2004-04-02 Mobilization and preparation on board
• 2004-04-03 Departure 11:15 local time, heading S. Start of operation (SVP) 14:10 before entering the Magellan Strait, 16:58 start recording Multibeam and SBP
• 2004-04-04 Start of operations out of Magellan Strait, sea state 3-4, direction NE-SW from base of accretionary prism to shelf. 1CTD cast and 4 XBT launches and start Multibeam postprocessing
• 2004-04-05 First DEM of Magellan Strait from 8111 data. Switch to N-S routes, 3 XBT launches, 1 CTD. Late afternoon stop mapping due to bad weather forecast, and ship heads to the Strait.

• 2004-04-06 At 00:12 local time, at the Strait entrance, a full electrical black-out brings the main engine to stop. Ship starts to drift toward the I.Desolacion. After several hours of emergency, with the assistance of two ships, at 05:30 main engine is switched on and ship moves immediately W to leave shoals. After release of anchors, ships gains the Strait round 12:00 and heads to Punta Arenas. Restart of Multibeam and SBP acquisition. Figures 18,19 and 20 show data during the event. A more detailed description can be found in [Bortoluzzi (2004)].

• 2004-04-07 Recording Multibeam and SBP in the Strait. Ship docks in Punta Arenas 08:00 local time.

• 2004-04-08 Demob in Punta Arenas
• 2004-04-09 Departure

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Figure 18: The emergency area and ship's track (CMG). The vector show ship's heading. UTC time.

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Figure 19: The emergency area and ship's track (CMG). The vector show ship's heading. GMT time.

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Figure 20: Attitude data from inertial system PHINS. GMT time.