Dear Secretariat, I am the author of the abstract "Using Web GIS to keep tracking tuna in the Vietnam offshore". Unfortunately, due to unforeseen I will not be able to attend to the GIS-IDEA conference. Please, apologies me. Best regards, Thai Khang ------------------------------------------------------------------------------------------------ Nguyen Hoang Thai Khang Department of Oceanographic Data, GIS and Remote Sensing Institute of Oceanography Add: 01 Cau Da - Nha Trang City - Khanh Hoa Province - Viet Nam Tel: 84.583.591410 Fax: 84.58.3590034 Cell phone: 84.935595913