1. Timing Of USAP Ship-Based Resupply at McMurdo

2. McMurdo

3. ODEN Route McMurdo Vladimir Ignatyuk Route

4. ODEN Route Tanker Route McMurdo Vladimir Ignatyuk Route

5. ODEN Route Tanker Route Cargo Ship Route McMurdo Vladimir Ignatyuk Route

6. ODEN Route Tanker Route Cargo Ship Route Southern Ocean McMurdo Vladimir Ignatyuk Route

7. Damaged Containers Destroyed Winches Icing Southern Ocean: Vigorous Storms

8. ODEN Route Tanker Route Cargo Ship Route Southern Ocean Ross Sea McMurdo Vladimir Ignatyuk Route

9. % Pack Ice Cover on 5 February 20032006 2007 20042005 2008 2009 10 of 11 years open Ross Sea: Select time for passage when open water corridor exists 2010 2011 2012 2013

10. ODEN Route Tanker Route Cargo Ship Route Southern Ocean McMurdo Sound Ross Sea McMurdo Vladimir Ignatyuk Route

11. McMurdo Sound: Fast Ice Blockade

12. Optimization for Ship Time Southern Ocean Select time for passage when storms are less likely Use state of the art weather information to time crossing Ensure ship suitability for withstanding storms Ross Sea Select time for passage when open water corridor exists Use state of the art ice information to route ships through ice Provide icebreaker escort McMurdo Sound Select time for passage when ice edge at maximum southern extent Select time for passage when ice is at its weakest Provide icebreaker escort

14. % Pack Ice Cover 18 Jan 2009 Ross Sea: Use state of the art ice information to route ships through ice

15. Ross Sea: Provide icebreaker escort

16. McMurdo Sound: Select time for passage when ice edge at maximum southern extent

18. First Year Sea Ice McMurdo Sound: Select time for passage when ice is at its weakest

19. Ice at WeakestIce Growth

20. Summary of earliest arrival considerations: No earlier than ~5 December for arrival of icebreaker (based on strength of McMurdo Sound ice) No earlier than ~15 January for arrival of icebreaker (based on extent of McMurdo Sound ice) No earlier than ~25 January for first supply ship (based on Ross Sea pack ice) 27 January for First Ship Arrival

21. Summary of latest departure: No later than late April (based on northern growth of McMurdo Sound fast ice edge) No later than middle March (based on shipping channel re-freezing) No later than than ~14 February (based on probability of open water in Ross Sea) 14 February for Last Ship Departure

22. Timing of USAP Ship-Based Resupply at McMurdo