Dear Fellow Diver:
After years of maintaining my bucket list, I finally
  signed up for a dive trip to the Revillagigedos
  (Socorro) Islands on the Nautilus Explorer when my dive
  shop booked an eight-day sojourn there, with six diving
  days. But as glad as I was to go, I found many problematical
  aspects about the dive operation and the diving
  itself.
It's a 220-mile, 24-hour steam from Los Cabos, Baja
  California, to the first dive. Because it is a rough
  open journey on the Pacific Ocean, I started my Bonine
  a couple days before boarding to combat my potential
  motion sickness (it worked).
 The Canadian-flagged Nautilus Explorer is 116 feet
  long and sleeps 25 divers, with doubles and a triple
  cabin on the lower deck, and larger staterooms on the
  upper deck. My standard double was perfectly comfortable
  -- I liked that the toilet/sink cubby was separate
  from the shower (water was hot and plentiful). The comfortable
  memory-foam mattress was fine, and though my
  lower deck cabin was near the anchor and engines room,
  I did not find the noise a problem (years of marriage
  have trained me to
  wear earplugs comfortably,
  and they're
  a plus on a liveaboard).
  Unlike other
  liveaboards I've
  dived from, heads and
  room were cleaned
  less frequently, generally
  when the two
  crew could get to it
  rather than during
  the morning dive. The
  two hostesses sometimes
  didn't remove garbage from the bathroom daily, though the
  Nautilus sewage system does allow one to
  flush biodegradable toilet paper, so the
  garbage was less nasty than with conventional
  marine heads.
The Canadian-flagged Nautilus Explorer is 116 feet
  long and sleeps 25 divers, with doubles and a triple
  cabin on the lower deck, and larger staterooms on the
  upper deck. My standard double was perfectly comfortable
  -- I liked that the toilet/sink cubby was separate
  from the shower (water was hot and plentiful). The comfortable
  memory-foam mattress was fine, and though my
  lower deck cabin was near the anchor and engines room,
  I did not find the noise a problem (years of marriage
  have trained me to
  wear earplugs comfortably,
  and they're
  a plus on a liveaboard).
  Unlike other
  liveaboards I've
  dived from, heads and
  room were cleaned
  less frequently, generally
  when the two
  crew could get to it
  rather than during
  the morning dive. The
  two hostesses sometimes
  didn't remove garbage from the bathroom daily, though the
  Nautilus sewage system does allow one to
  flush biodegradable toilet paper, so the
  garbage was less nasty than with conventional
  marine heads.
For the $3,200 I paid, I would expect
  more staff. The two young divemasters (one
  age 19) had to manage 25 divers, and they
  would always surface early to lend a hand on
  deck. The additional crew included the captain
  and his mate, a chef, two hostesses, an
  engineer and a deckhand. The staff was mostly
  Canadian and American, with Irish chef
  Jayne in charge of the kitchen. The mate or
  captain often drove the panga. I dived separately
  from the group, which I often prefer,
  but did so in these rugged waters partly
  because there were so few dive guides.
 Why crew size mattered crystallized for me on a dive at Roca O'Neal at
  the islet of Roca Partida, which was seriously rough, both on top and below.
  Dives tended to be deep (90-110 feet) and never more than 60 minutes, often
  under 40, so though tiring, one could do four of them (on two days, only three
  dives were offered). At first, the deep wall, arch and vista of light coming
  through the rocks at 110 feet were enchanting. I heard magical humpback songs
  in the distance. As I approached the rocky outcropping, the current and surge
  grew unmanageable. I became separated from the other divers, and as the powerful
  surge tossed me like a Frisbee, I realized I had to abort the dive. Alone
  and, frankly, anxious, I ascended without a safety stop (per the boat's directions,
  no blue hangs because the currents can move you far and fast). On the
  surface, I pulled out my little-used safety sausage and, yikes, it had holes
  in it. Still, I figured the two pangas would find me as I waved, hollered and
  lifted up my fins. Regardless, I remained invisible. Finally, I found my second
  sausage, hole-free, sent it up and was picked up. Alone for 15 minutes, I
  was weary and apparently stressed, because I had forgotten that the boat had
  equipped each diver with an emergency radio and GPS, which was attached to my
  BCD. Had I remembered, it would have eased my anxiety. Now, if you are reading
  and thinking, "What a wimp," I can say I have made almost 3,000 dives and am
  professionally trained. In other words, these were challenging conditions for
  anyone. Experienced divers are not immune to error.
Why crew size mattered crystallized for me on a dive at Roca O'Neal at
  the islet of Roca Partida, which was seriously rough, both on top and below.
  Dives tended to be deep (90-110 feet) and never more than 60 minutes, often
  under 40, so though tiring, one could do four of them (on two days, only three
  dives were offered). At first, the deep wall, arch and vista of light coming
  through the rocks at 110 feet were enchanting. I heard magical humpback songs
  in the distance. As I approached the rocky outcropping, the current and surge
  grew unmanageable. I became separated from the other divers, and as the powerful
  surge tossed me like a Frisbee, I realized I had to abort the dive. Alone
  and, frankly, anxious, I ascended without a safety stop (per the boat's directions,
  no blue hangs because the currents can move you far and fast). On the
  surface, I pulled out my little-used safety sausage and, yikes, it had holes
  in it. Still, I figured the two pangas would find me as I waved, hollered and
  lifted up my fins. Regardless, I remained invisible. Finally, I found my second
  sausage, hole-free, sent it up and was picked up. Alone for 15 minutes, I
  was weary and apparently stressed, because I had forgotten that the boat had
  equipped each diver with an emergency radio and GPS, which was attached to my
  BCD. Had I remembered, it would have eased my anxiety. Now, if you are reading
  and thinking, "What a wimp," I can say I have made almost 3,000 dives and am
  professionally trained. In other words, these were challenging conditions for
  anyone. Experienced divers are not immune to error.
Sometimes I entered and exited off the stern of the boat, when they were
  able to anchor in shallow water; otherwise, we dived from rigid inflatable boats
  (RIBs). The Explorer's back deck slopes downward, rather like a driveway, and is
  lined on both sides with tanks and gear. With the boat rocking, you can imagine
  waddling down it wearing 70 pounds of gear in high seas was terrifying. No
  style points -- just staying upright was enough. Then one flopped into the RIB.
  I didn't cotton to their system of running the RIB bow up onto the back deck,
  then having to clamber aboard in full gear while the surge roared. Indeed, getting
  on and off either the transom of the Nautilus Explorer directly, or the
  RIBs was tricky and rough in most seas. I was surprised no one was hurt. Since
  it was a skeleton crew, there was not always someone there to help catch teetering
  divers. One RIB had a ladder, but the other required a Shamu-style entry
  from the water. Though it's wise to be in good shape for diving, not even
  Herculean strength can prevent a rogue wave from turning one ass-over-teakettle.
  The crew worked hard to haul us out of the water, but a few more strong hands
  would have made that task go more smoothly. A crew member told me that the deck
  will be flattened in dry dock this month, and the two worn-out RIBs will be
  replaced with sturdier boats with ladders and large outboards. While entries
  onto the new pangas should be safer than the current system, we had to dance
  with the ones that brung us.
At Socorro Island, our morning began with a visit from the Mexican Navy,
a feature of every trip. After their inspection, we did our first dive day at
Cabo Pierce, which featured great views of other divers' bubbles but virtually
no animal encounters. Part of it may be due to the guides' inexperience. The
19-year-old divemaster had been on the boat all of three weeks and was hardly
a naturalist. The other divemaster with a naturalist bent was ill for part of
the trip. And surely what one encounters depends on nature itself; the animals
aren't on leashes or under contract. I was there during shoulder season in
April, so perhaps that is why we saw fewer big boys. It's a curious paradox.
On the one hand, I love diving solo and not being ridden or babysat. Yet, on
the other, I missed the eagle eye of an informed, experienced and enthusiastic
underwater naturalist. Megafauna are great, but so are the little guys.
The sites are similar to Costa Rica's Cocos Island -- rocky, with little
  or no coral, either soft or hard. Fish teemed, particularly schools of horseeye
  jacks and trevally; white-tip and black-tip sharks darted around, and at
  sites like Roca Partida, white-tips piled on top of each other in crevices in
  the wall. It reminded me of college students stuffing into a Volkswagen.
 I enjoyed our one night dive at the Aquarium, a quiet enough site that the
  boat could safely anchor. After a giant stride off the transom, I descended to
  65 feet. Lots of invertebrates scuttled around the rocky bottom -- a robust
  slipper lobster shuffled around near a spiny lobster, while an octopus hunted,
  using my light to spot prey. I found a large reef tiger eel, a first for me. White-tips darted around, and trevalleys
  also used my lights to hunt. Best
  of all was the magical sound of humpback
  song in the distance. The only
  night dive of the trip, it was limited
  to 45 minutes. I wished I could have
  stayed down twice as long. Afterwards,
  hostesses Katie and Ashley were on deck
  with hot chocolate and cookies (during
  day dives, they offered water, orange
  slices and cookies).
I enjoyed our one night dive at the Aquarium, a quiet enough site that the
  boat could safely anchor. After a giant stride off the transom, I descended to
  65 feet. Lots of invertebrates scuttled around the rocky bottom -- a robust
  slipper lobster shuffled around near a spiny lobster, while an octopus hunted,
  using my light to spot prey. I found a large reef tiger eel, a first for me. White-tips darted around, and trevalleys
  also used my lights to hunt. Best
  of all was the magical sound of humpback
  song in the distance. The only
  night dive of the trip, it was limited
  to 45 minutes. I wished I could have
  stayed down twice as long. Afterwards,
  hostesses Katie and Ashley were on deck
  with hot chocolate and cookies (during
  day dives, they offered water, orange
  slices and cookies).
The Nautilus Explorer is a comfortable
  craft. The second deck, with
  a hot tub and lounge chairs, was a
  pleasant place from which to enjoy a
  beer and watch the stars. The salon
  boasts a TV, DVD player, Mac PC and
  lots of fish and critter reference
  books. A previous guest had pinched
  the Galapagos/Eastern Pacific fish ID
  guide -- for shame! After dinner, many divers enjoyed a nightcap (margaritas
  were popular, but the house wines and Mexican beers were good as well,
  around $6 per drink) and socialized until exhaustion forced bedtime. The divers
  came from all over Europe (Italy, Germany, France), and based on the many
  languages featured in the books in the salon, it's a popular destination for
  Europeans. English was the lingua franca.
I really liked the food, and Jayne honored special dietary requests. Her
  knowledge of world cuisines was passionate and earned the hard way by working
  in kitchens from Indonesia to Portugal. The breakfast buffet included frittatas,
  eggs, turkey bacon and excellent baked goods. Lunch featured lasagna, pizza, a
  deli buffet, salads and always a good soup. Dinners were served family-style on
  platters at each of three tables, and included salmon with fruit salsa, achioterubbed
  chicken, beef stroganoff, salads garnished with mango and dried cherries;
  desserts included red velvet cupcakes and berry crumble with ice cream. Jayne
  also made excellent cookies and coffee cakes.
Coordinating dive times ran into conflicts with the Nautilus Explorer's
  sister boat, the Belle Amie, pushing dives back an hour or so because the
  sites were so small that both boats could not put all divers in simultaneously.
  It was annoying to be ready for a 7:15 a.m. dive only to be informed that
  thanks to the company's other boat, with its 30 divers, our time would be an
  hour later.
Water ranged from 72 to 76 degrees, visibility ranged from good to low,
  and most divers wore 7mm one-piece suits and hoods. Ironically, Mexican regulations
  forbid divers to wear gloves, but there is hardly any coral, so why one
  is prohibited from wearing gloves in roaring current is hard to fathom. You are
  also not permitted to carry an underwater noisemaker or even a flashlight for
  peering into holes during the day. I frankly ignored the glove and light rules,
  and thus, did not rip apart my hands when I needed to hang onto a rock.
Wisely, the itinerary ended with a guaranteed crowd-pleaser, the Boiler
  off San Benedicto Island, an underwater pinnacle boasting manta cleaning stations,
  cavorting dolphins and the occasional silky shark. The number of mantas
  was thrilling -- six? 10? 20? -- and their enormity and grace profoundly meditative.
  They cruised by, sometimes cephalic fins furled and sometimes unfurled,
  as Clarion angels nipped and groomed them, jacks slipstreamed and remoras
  clung. I swear the dolphins showed off: I'm a marine mammal, I'm cute and look
  at what I can do! And here is where I sighted a young whale shark two days
  running, and spent some quality time with him.
Despite my delight in the encounters with megafauna, I remain ambivalent
about the trip. It was expensive for the value received: add Nitrox, tips,
etc., to the $3,200, and it ran almost $600 per day of diving, high by my
standards. Furthermore, many of us divers picked up an intestinal bug, perhaps
food borne, and lost at least one day of diving. I can't think of anything
I could have done differently to avoid picking up the bug: I washed my
hands carefully, drank clean water and have always done well, no matter how
funky the destination. For that kind of money, I expect more help with my
gear, more comfortable pangas, and something special, maybe massages! Though
the food was excellent, cabin comfortable enough, and diving sometimes exciting,
the absolute cost is high for this trip. Even the ritziest liveaboards
in pricey locations cost less than this for six diving days, and the Nautilus
Explorer operation is far from ritzy. I would be writing a far less equivocal
feature if the price had been less.
P.S.: Since I took this trip, a few Undercurrent readers have filed positive
  trip reports for the Nautilus Explorer, which now has a different captain
  and dive crew from that on my trip. It made me think about how critical crew
  members and attitude are for a successful trip. Perhaps my experience would have been more worthwhile had the crew been different. I think of vessels like
  the Rocio del Mar, plying the same waters, and its family atmosphere, plentiful
  crew and warm service. Would I have written a very different feature? Or
  would I have had a different experience with the crew now on board the Nautilus
  Explorer? Just as manners maketh the man, the crew makes the trip.
-- A.E.L.
Our undercover diver's bio: A.E.L., our undercover reviewer, says, "I started diving
  in my 30s and hate realizing I'm now that cliché, the baby boomer diver. However, that
  does qualify me to riff on those fussy comforts that the fit-but-not-40 diver notices.
  I've been lucky to make over 3,000 dives all over the world, and have taken fellowships
  and jobs based solely on diving opportunities. My spouse and I share not only a
  love of diving but also a passion for the environment, and support organizations like
  REEF and Seacology. When not diving, I am planning more dive trips."
 Divers Compass: With embarkation at 8 A.M., everyone arrived
  the night before in Los Cabos and stayed over; my hotel, the
  Siesta Suites, was basic to the point of being a little creepy
  . . . Taxi from airport to town runs $80; Nautilus Explorer
  provided group taxis for the morning pickup, about $20 per person
  . . . Steel 100 tanks were available for $100 (well worth
  it to balance out the 7mm suits most wore), Nitrox was $100 for
  the trip, but if you dove aluminum, there was no extra charge;
  they offer rental gear and wetsuits . . . Tipping is at the
  end of the trip in the usual envelope; a credit card payment only reaches
  the crew at paycheck time, every three months, so cash is preferable . . .
  Website: www.nautilusexplorer.com
Divers Compass: With embarkation at 8 A.M., everyone arrived
  the night before in Los Cabos and stayed over; my hotel, the
  Siesta Suites, was basic to the point of being a little creepy
  . . . Taxi from airport to town runs $80; Nautilus Explorer
  provided group taxis for the morning pickup, about $20 per person
  . . . Steel 100 tanks were available for $100 (well worth
  it to balance out the 7mm suits most wore), Nitrox was $100 for
  the trip, but if you dove aluminum, there was no extra charge;
  they offer rental gear and wetsuits . . . Tipping is at the
  end of the trip in the usual envelope; a credit card payment only reaches
  the crew at paycheck time, every three months, so cash is preferable . . .
  Website: www.nautilusexplorer.com