Dear Fellow Diver,
Several years ago, during the winter whale shark
  migration in the Andaman Sea, I joined the Pelagian liveaboard
  out of Phuket, an island in Southern Thailand questionably
  called "the pearl of the sea." Thai dive boats
  once guaranteed whale shark sightings or they'd refund your
  money. By the late '90s, those guarantees disappeared as
  fewer whale sharks were sighted, to some extent because they
  are being slaughtered for shark fin soup. The day we circled
  their favorite haunt, Richelieu Rock, I saw none. This
  March I gave Andaman another try. The conditions seemed
  perfect. Consistent 83-degree aqua blue water combined with
  the greenish bloom of plankton in the usual whale shark
  seamount hangouts. How could those behemoths deny me?  
I landed in Phuket(poo-ket'), where the main town is
  Patong Beach, a somewhat seedy beach town offering sexual
  and massage services with "happy endings" and lots of cheap
  merchandise knock-offs. From there, it was a 45-minute
  shuttle to the 115-foot Aqua One, built as a dive boat in
  1999. Cruise director Johnny Gallick, a Connecticut expat,
  welcomed us aboard and briefed us. He introduced our
  two Indonesian divemasters, Ali, a "ghost pipefish expert"
  and Nus, a "frog fish specialist"; Tia, who covered the
  deck and salon; and two female servers. Proud of his
  Italian heritage, Johnny is a self-described "sea gypsy,"
  who joined the Aqua One four years ago. During the offseason,
  he designs his own line of clothing and surfboards,
  called "Bonehead."  
I joined eight other divers who travel the world
  together diving exotic destinations. The "Chicken Divers,"
  as they call themselves, brought their mascot, a rubber
  chicken (decked out with a SARS protection mask), which
  eventually was rigged to the masthead to flutter with
  Buddhist prayer flags.  Chicken's predecessor had disappeared in a bait ball during a
shark feed in Papua New Guinea.
Two young, friendly, twentysomething
Austrians rounded out
the passenger manifest.
Chicken's predecessor had disappeared in a bait ball during a
shark feed in Papua New Guinea.
Two young, friendly, twentysomething
Austrians rounded out
the passenger manifest. 
Bang! The religious tradition
  of lighting firecrackers
  announced Aqua One's departure,
  and we headed north to Mu Ko
  Similan National Park -- a
  five-hour boat ride -- cruising
  at a speedy 18 knots. The
  nine granite islands are lush
  with tropical jungle and sprinkled
  with white sandy beaches.
  We took a check-out dive at
  Moonlight Bay, where a damsel
  fish harassed an octopus on a
  coral bommie and I followed a
  rare golden whiptail ray down
  to 90 feet. There were
  cowries, nudibranch, scorpion and lion fish, schools of small jack, and a hawksbill
  turtle. Pointing with a chopstick, Nus showed us several ghost pipefish camouflaged
  in soft coral. Ali pointed to two octopuses making boom boom, as the Thai
  say. The mooring line broke during a safety stop, a warning that divers here must
be skilled enough to hang at 15 feet without support. 
Boulders the size of an apartment building dominated the underwater landscape
  at Similan Island #2. Two 6-foot leopard sharks lazed in the sand at 85 feet.
  Several blue crowns of thorn were inflated like basket stars. Pairs of longfin and
  phantom banner fish darted around the rocks. As the current picked up, viz dropped
  from 100 to 75 feet. Finning behind the huge rocks, I avoided the current, but one
  of AO's two Zodiacs (they had ladders) would pick us up whenever we needed a hand.
  Johnny treated us as responsible, experienced divers -- no crew-checked air gauges,
  return to the boat whenever, no formal buddy pairing. We could be diving maniacs
  or responsible free spirits. Still, he did ask that we carry safety sausages to
  protect us from being run over by other boats, which were common above.  
 At #5 island (that's how they name them) I saw an amazing rainbow of corals,
  red pencil anemones, and blue and purple gorgonians overwhelmed by massive staghorn
  and lettuce coral. Lionfish hung
  under ledges. Triggerfish dug
  nests in the sand. A pair of
  Oriental sweetlips disappeared
  into a school of shimmering silversides.
  At Snapper Alley,
  there were two ghost pipefish
  camouflaged in soft coral, a red
  long-snout pipefish hiding among
  red rods, and a motionless stonefish.
  Hanging under ledges were
  spotfin and black white-lined
  lionfish. At night, I saw spider
  and porcelain crabs, harlequin
  shrimp, nesting parrotfish, and
ghost pipefish.
At #5 island (that's how they name them) I saw an amazing rainbow of corals,
  red pencil anemones, and blue and purple gorgonians overwhelmed by massive staghorn
  and lettuce coral. Lionfish hung
  under ledges. Triggerfish dug
  nests in the sand. A pair of
  Oriental sweetlips disappeared
  into a school of shimmering silversides.
  At Snapper Alley,
  there were two ghost pipefish
  camouflaged in soft coral, a red
  long-snout pipefish hiding among
  red rods, and a motionless stonefish.
  Hanging under ledges were
  spotfin and black white-lined
  lionfish. At night, I saw spider
  and porcelain crabs, harlequin
  shrimp, nesting parrotfish, and
ghost pipefish. 
Ko Bon, just outside the
  Similan Islands, has been designated
  a marine park for
  only a few years. Damage
  from dynamite fishing is evident
  between patches of
  healthy coral. Here, mantas
  circled us curiously.
  Clownfish darted from dozens
  of anemones. I saw black
  common octopus, moray and
  sharp-nosed eels, many species
  of nudibranch, and a lone
  reef shark. Continuing north,
  we dived Koh Bon and Koh
  Tach, a seamount where a
  manta greeted me. There was
  a plateau with a batfish
  cleaning station, and whitesegmented
  worms nibbled on
  barrel sponges. Chevron barracuda,
  jack, and trevally
  swam in the swirling currents.
  A bright yellow day boat
  dropped a couple of dozen
  divers on the mount, roaring
its engine above us. 
The AO was designed with
  comfort in mind. In the
  salon, there were four tables
  for dining, and forward a
  couch with video, DVD, and
  stereo. Upstairs, there was
  a library with a comfortable
  couch, working table for cameras,
  and a charging station;
  on the outside sundeck were
  more camera tables with an
  air hose. Eight roomy, airconditioned
  cabins (with individual
  controls) house 16 passengers.
  Each cabin is configured
  with queen or twin
  beds (a wood partition offers
  some privacy), a head, and
  shower. They provide flipflops,
  a robe, and a hair
  dryer. The four deluxe cabins
  on the salon deck have full-size windows in both the bedroom and shower. The
  lower deck has four less desirable cabins (rumored to have a cockroach or two),
  where the occupants could hear the nonstop drone of the engines and generator;
  these rooms were not as well ventilated and had portholes instead of full-size
  windows.  
Each diver was assigned a gear basket and an aluminum 80, reliably filled to
  3,200 psi, with 32 percent Nitrox if desired. Tia, always smiling, was there to help with a BC strap or pull off your wetsuit. The dozen crew were gracious and
accommodating, and though they spoke little English all excelled at their jobs.
They taped a number on each camera for identification (five of us were using
Ikelite digital housings) and checked the Nitrox percentage. Twin stairs with five
easy fin-walking steps led to the water (on some dives we rode in dinghies).
There were two large tanks for camera rinse and two for gear.
Leaving Koh Tachai, we motored north to Richilieu, unfortunately not part of
  the Mu Ko Similan National Park, so when the dive boats leave each day, fishermen
  lower their nets. Macro was the big
  draw during our 2 1/2 days. Shrimp -
  - red and white Christmas cleaners
  and banded coral, cricket-like ridgedback
  and Harlequin shrimp -- were
  everywhere. A lone cuttlefish hovered
  over a nest of eggs. A stunning,
  rare red pencil anemone
  appeared like a stain on the ocean
  floor. A school of squid pulsated in
  the current. A pair of yellow seahorses
  stood out in the rocks. A
  hawksbill turtle seemed unruffled by
  photographers. Schools of Chevron
  barracuda circled. In one area,
  clams spawned, shooting mini-geysers
  into the water. Large spotted potato
  cod, being cleaned by wrasse, lazed
  on rocks. As familiar as I became
  with the seamont, I always found
something new. 
Leaving Richilieu and heading
  south, we stopped at an unnamed wreck
  where puffers were so large they had
  remoras attached. Then we continued
  motoring 12 hours and 25 miles southwest
  of Phuket to 5 Islands, where a
  night dive yielded decorator crabs
  and a leaf scorpion fish. Early the
  next morning, we stopped at Koh Bida
  Nok near Phi Phi, where red limestone
  islands have been the backdrop for
  James Bond films, with plenty of
  critters, a leopard shark basking on
  the sand, and swim-throughs filled
  with glassy sweepers. At one site, a
  potentially deadly black banded sea
  krait slithered by, one of three on
  the trip. Cool as it was, I was
  still looking for whale sharks.  
Crowds are a problem almost
  everywhere, thanks to more than 50
  dive operators in Phuket. I counted
  13 dive boats one morning. In one
  swim-through, a beginning diver fighting
  the surge kicked me. A psycho dayboat divemaster leading
two divers at
Richelieu got agitated
because the Chicken
Divers were photographing
some harlequin shrimp.
He threatened us with a
gesture like he was cutting
his throat, flipped
off the divers, and then
tried to kick Ali. Once,
as we hung for a safety
stop on a common mooring
line to which another
boat happened to be tied,
their guide gave us a
finger shaking. It wasn't
unusual to see a pack
of divers following a
divemaster in a single
formation, bypassing many
interesting critters.
Johnny heard over
  the radio that divers had
  sighted a whale shark at
  Red and Purple Rocks, so
  we left #5 island and
  headed farther south,
  arriving at daybreak.
  Jumping off the dive
  platform, I descended into the plankton-rich, 25-foot visibility water of Purple
  Rock. Schools of spadefish and barracuda hovered. The anemone-covered seamount had
  lots of critters including a green mantis shrimp and a gorgeous green and blue
  juvenile emperor angelfish. And no whale shark. But wait! Back on the boat, we
  heard a whale shark had been sighted at nearby Red Rock, so back we piled into the
  Zodiac. No whale sharks there, either. Returning to Purple Rock, the plankton was
  soupy, but I watched 12-foot majestic black mantas circling. The current pulled us
  away from the boat, and one diver who chased a manta wasn't found until after sunset.
  When he flashed his camera strobe to signal, he was a good half-mile from the
  boat. The incident did suggest safety shortcomings. With divers in the water,
  both chase boats were tied to the Aqua One's stern, and there was no provision for
divers to log in or out for dives, a serious shortcoming. 
Each morning at 7 a.m., an ornate Thai bell tinkled, but most divers were
  awake, coffee from fresh ground beans in hand, tackling a light breakfast of yogurt
  and toast or cereal, and ready to dive. Johnny gave theatrical dive briefings with
  a hand-drawn topographical map, and all of us were in the water before 8 a.m. Upon
  return from the first dive, our full breakfast would be on the table -- fresh
  fruit, eggs, bacon, sausage, and pancakes. If I lingered underwater, my breakfast
  would be cold. Filtered water was served, and an espresso coffee maker was popular,
  as was the green tea. Meals were primarily Thai cuisine, which could have
  been a tad spicier, with delicious flavors of garlic, ginger, cilantro, and lemon
  grass. Dessert was frequently a cake, fresh fruit, or ice cream.  There was always
  a noodle dish and some fish, chicken, or vegetarian alternative, but no special
  presentation. Sometimes the food was boring -- spaghetti was served three days in
  a row -- and though generally tasty, it wasn't imaginative. Most meals were served buffet-style including a mixed-grill,
sundeck barbecue. There was the
"drink, don't dive" policy, but the
only alcohol on the boat was complimentary
beer and one bottle of Thai rum
(which didn't last long). This was a
five-dive-a-day kinda group.
There was always
  a noodle dish and some fish, chicken, or vegetarian alternative, but no special
  presentation. Sometimes the food was boring -- spaghetti was served three days in
  a row -- and though generally tasty, it wasn't imaginative. Most meals were served buffet-style including a mixed-grill,
sundeck barbecue. There was the
"drink, don't dive" policy, but the
only alcohol on the boat was complimentary
beer and one bottle of Thai rum
(which didn't last long). This was a
five-dive-a-day kinda group.
There was no authoritative 24-
  hour "no-fly" rule. We each made our
  own determinations based on our individual
  computer readings, and on the
  final day made two or three dives
  accordingly. At Koh Yuhn, two hours
  south of Phuket, I stayed shallow (50
  feet) doing muck dives. In the sandy
  25-foot visibility, I found unbelievable
  critters like small speckled
  frogfish, velvetfish, red seahorses, sea moths, leather jackets, column anemones
  with transparent shrimp, sea pens, and a small flounder and octopus. Even the
  Thai fish guide nudibranch cover girl Thecacera -- the spotted, tiger-striped, twoappendage
  (a pair on both its rhinophores and gills) -- posed for us.  
Before I had peeled off my skin after the last dive, Tia, who had just handed
  me a hot towel, had my gear rinsed in clean water and drying for the trip home.
  No whale sharks, a few mantas and sharks, not a lot of big fish, plenty of tropicals
  and macro. Though the variety of diving and camaraderie, unique critters, and
  a superb and eager staff made this trip special.  
-- G.S. 
 Diver's Compass: The 10-day trip costs $3,075; add $16/day for
  Nitrox. ... The Aqua One offers Andaman trips between November
  and May; cruises to Indonesian waters were planned June to
  October, but a reticent American clientele, afraid of terrorism,
  has put that destination on hold. ... Depending on season and
  stops, round-trip fare runs $950-$1600. ... After a long 18-
  hour, nonstop, Singapore Airline flight, I decompressed in
  Singapore two days at the Sea Pearl hotel in Phuket before joining
  up with the group. ... Arrive a day early and take a tour of a rubber tree
  forest, a silkworm and silk factory, and a cashew plant. ... Art Travers of
  Poseidon Ventures organized the trip. ... Aqua One offers Scubapro dive rental
  gear. E-6 processing was done daily, but most shot digital and brought computers
  loaded with Adobe PhotoShop to download images. ... The crew was certified in the
  use of DAN-approved oxygen. Phuket has a deco chamber. ... Lycra was necessary to
  protect against hydra and the occasional jelly. ... www.dive-aquasports.com or
  aquaone@.dive-aquasports.com
Diver's Compass: The 10-day trip costs $3,075; add $16/day for
  Nitrox. ... The Aqua One offers Andaman trips between November
  and May; cruises to Indonesian waters were planned June to
  October, but a reticent American clientele, afraid of terrorism,
  has put that destination on hold. ... Depending on season and
  stops, round-trip fare runs $950-$1600. ... After a long 18-
  hour, nonstop, Singapore Airline flight, I decompressed in
  Singapore two days at the Sea Pearl hotel in Phuket before joining
  up with the group. ... Arrive a day early and take a tour of a rubber tree
  forest, a silkworm and silk factory, and a cashew plant. ... Art Travers of
  Poseidon Ventures organized the trip. ... Aqua One offers Scubapro dive rental
  gear. E-6 processing was done daily, but most shot digital and brought computers
  loaded with Adobe PhotoShop to download images. ... The crew was certified in the
  use of DAN-approved oxygen. Phuket has a deco chamber. ... Lycra was necessary to
  protect against hydra and the occasional jelly. ... www.dive-aquasports.com or
  aquaone@.dive-aquasports.com