The HTMS Chakri Naruebet, carrying four helicopters, and the HTMS Surin, with several marine amphibious landing craft aboard, left Sattahip Naval Base in Chon Buri at 8 o'clock last night and are steaming to Songkhla's Hat Yai district.
The convoy is expected to arrive by 1pm today.
The Chakri Naruebet will act as a command post, helicopter pad, mess hall, kitchen and floating hospital.
The Navy has opened a hotline at 1669 and welcomes donations at two locations during office hours - Directorate of Civilian Affairs near the Grand Palace (call 02- 475 4960 for details), and Bangkok Naval Base in Bangkok Noi district on the Thon Buri side (02-475 4943).
The Bangkok Metropolitan Administration has delivered 1,000 survival kits and 17 flat-bottom boats to Na Thawee and hard-hit Hat Yai district.
The supplies were flown from Bangkok on two Air Force cargo planes.
Today 1,500 more kits will be sent, followed by mobile medical teams in the near future.
The Nation Multimedia Group's relief provisions have reached flood victims in Ayutthaya, with transport provided by Isuzu trucks and a logistics firm.
The Thai Red Cross Society has set up mobile kitchens to feed flood victims in Ayutthaya, mainly serving breakfast to monks in the morning, lunch to relief workers and dinner to villagers.
Some 50 volunteer cooks prepare 3,000 meals daily. -The Nation/ANN