After several years of construction and two years delay opening the new "one stop" checkin centre for yachts visiting Phuket is supposed to finally open at Ao Chalong.
the new onlin checkin form form can be found here
NOTICE : here is the address for the new on line check in at PHUKET YACHT CONTROL CENTER ,located in the Chalong Pier
Phuket Yacht Checkpoint Control System
Page 8 has a curious question. It seems they want you to declare how much opium (in taels) you are carrying and how much is for personal consumption