Blue Marlin - Scuba diving daytrips at Richelieu Rock Koh Tachai & Koh Bon

Blue Marlin

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Blue Marlin - Richelieu Rock Koh Bon Koh Tachai day trip diving
Thailand Thailand
Type: Day Trip
Departs from: Baan Nam Khem Pier, Khao Lak, Phang Nga
No. of guests: 20
Boat rating: 9/10 Based on 8 divers
Read all Blue Marlin reviews
Prices from: 135 USD
Booking / Enquiry
Contents [Show]

Brand new in 2018, Blue Marlin is a large purpose-built scuba diving speedboat. With an experienced European team and warm Thai hospitality. Its trips to Richelieu Rock, Koh Tachai & Koh Bon are a lot of safe & affordable fun. Blue Marlin only visits the best dive sites in Thailand, and the journeys from Baan Nam Khem Pier are smooth & comfortable, mainly due to the clever design and build of this great new diving speedboat. Up to 20 divers are able to sit comfortably during the crossings, and you can easily walk around during the lunchtime break. There are shaded and sunny areas, a clever environmentally-friendly toilet, and ice-cold soft drinks for free.

Blue Marlin is very large, at nearly 16m in length, and it's powered by three large outboard 4-stroke motors. You can maximise your time on land or at Khao Lak hotels and resorts due to the smooth transfer service, and the quick but comfortable journeys out to the dive sites & back. Unlike its competitors, Blue Marlin has a clever design that offers a proper dive deck, instead of forcing divers to struggle past the motors while wearing fins. Also, instead of having the tanks and equipment in the middle of the boat, this is all kept behind the seats, meaning that everyone can see each other and communicate easily. Up to 5 dive guides take groups of up to 4 divers in carefully-selected groups depending on certification level, diving experience and who’s friends and family.

Trips are scheduled to go to Richelieu Rock up to four days per week, Koh Bon two days and Koh Tachai one day. In the situation when a planned Koh Bon or Koh Tachai trip is not possible, Blue Marlin will go to The Similan Islands instead. This will only happen if all of the diving ticket allocation for Koh Bon or Tachai runs out.

Blue Marlin guests are required to spend the night before each trip in Khao Lak (not Phuket), in order to be able to visit the the dive centre to ‘check in’ before 6.00pm.

Prices & Schedule

Blue Marlin Diver Prices Overview 2024 / 2025
DestinationsDuration Per diver
( 2 Dives)
1D Per diver135 USD
Included In The Price
Transfers to and from local hotels
Tea / coffee
Drinking water
Soft drinks
Weights & weightbelts
Standard tanks
Dive master services
Not Included In The Price
Transfers to & from the airport
Dive equipment
National park fees
Dive insurance
Enviroment tax
Larger tanks
Tips / Gratuities
View More Months
View More Available Months


Booking / Enquiry

Blue Marlin guests need to check-in at the dive centre the day before departure and stay in a Khao Lak hotel that night.

After being picked up from hotels around Khao Lak, you are taken to Baan Nam Khem Pier to the north.

Departure from the pier is at 9.00am. There are 2 scheduled dives, with lunch provided during the surface interval.

Upon return to Baan Nam Khem Pier, you are transferred to your chosen hotel around Khao Lak.

The itineraries below are the most-common for each trip, but these can sometimes be changed for a number of reasons. Small changes are made due to weather & sea conditions, special marine life sightings, overcrowded dive sites, local-authorities' instructions, and the needs & requests of the paying guests. The safety & comfort of all guests is most important at all times.

Itinerary Name (click the itinerary name to open) Days / Nights Number of dives
Koh Bon 1 Days / 1 Nights 2 Dives

Facilites, Layout and Specifications

Facilities Available with Blue Marlin
Nitrox Available
Vegetarian Food Available
Available to Charter
Quick Journey Times


Contact us for more information about courses on Blue Marlin

Transfer details

Blue Marlin transfers are for free to guests in central and north Khao Lak. The transfers are shared with other Blue Marlin guests.

Guests staying 'over the hill' to the south of Khao Lak need to pay a surcharge of 100 THB/person.

The departure pier is to the north of Khao Lak. Therefore, guests staying in hotels around the south of Khao Lak are collected first in the morning and dropped off last in the afternoon. Those who are staying further north are picked up last in the morning, and dropped off first in the afternoon.

Transfers cannot wait for guests who are late or still eating breakfast at the agreed pickup time.

Blue Marlin Scheduled Transfers
1D Trips
07:20 - 08:20 Pick up from Khao Lak : Free
08:30 Departure ( Baan Nam Khem Pier, Khao Lak )
15:15 Return ( Baan Nam Khem Pier, Khao Lak )
15:15 - 16:15 Drop off to Khao Lak : Free
Blue Marlin Scheduled Transfers
1D Trips
9:20:00 - 10:20:00 Pick up from Khao Lak : Free
10:30 Departure ( Baan Nam Khem Pier, Khao Lak )
15:15 Return ( Baan Nam Khem Pier, Khao Lak )
15:15 - 16:15 Drop off to Khao Lak : Free

Guests who are unable to meet the scheduled pick ups or would like private transportation are welcome to contact us to arrange a private taxi at the most competitive rates.

Booking / Enquiry

Booking or enquiring is easy follow these steps
Step 1:
Complete the form below by entering your details
Step 2:
We usually reply within 2 hours (please check your email & spam)
Step 3:
We can reserve your space(s) commitment-free for up to one week
Step 4:
Deposits to book are usually paid using any card, PayPal or bank transfer

Fields marked with are required

Blue Marlin Reviews

Read real reviews from people who have dived with Blue Marlin
Tony Hayes Blue Marlin
Tony Hayes
Nationality: British
Dived: 16 April 2024
Boat rating: 9/10
A great experience all round, dive guides professional and knowledgable delivering great briefings. The boat crew were also first class
Madeleine Blue Marlin
Nationality: British
Dived: 29 December 2023
Boat rating: 10/10
My boyfriend and I came to do richelieu rock. All the team were so friendly and professional. I felt like our safety was always in mind but also they made everyone at ease and the trip a comfortable. We dove with Pepe who was fantastic. My boyfriend's weight belt fell off and he started floating up to the surface quickly. Pepe reacted so quickly and really helped him out, guiding him through the experience and getting him back down. One of the other divers Alex also rescued the belt and brought it back ashore. The food was yummy and the boat is comfortable and nice. All in all a fantastic diving experience.
Robert Blue Marlin
Nationality: American
Dived: 07 December 2023
Boat rating: 9/10
Every employee was friendly, helpful and made the whole day more pleasant.
Ale Blue Marlin
Nationality: Italian
Dived: 01 March 2023
Boat rating: 9/10
Day trip well organized, nice experience at the Richelieu rock. Food was good, they include a soft drink of your choice as well and fresh water along the day. The instructors are funny people well prepared
Randall Blue Marlin
Nationality: British
Dived: 21 February 2023
Boat rating: 9/10
Great team , very professional , lots of attention to detail - especially security . All in all a good experience . You also get the best price when booking via No Troubles, Just Bubbles .
Yoyorun Blue Marlin
Nationality: French
Dived: 30 October 2019
Boat rating: 9/10
Highly Professional organization. Blindly recommended
Yoram Blue Marlin
Nationality: Israeli
Dived: 17 April 2019
Boat rating: 10/10
We had excelent dives. Jamie was very helpfull all the way.
cameron Blue Marlin
Nationality: New Zealander
Dived: 24 February 2019
Boat rating: 8/10
great day out, made better by the lovely staff looking after us.
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