The Palau Aggressor and Rock Islands Aggressor are sisterships and 106’ long with a 30 ft. beam, built and powered for comfort, safety and stability and comfortably accommodates 18 guests in 9 spacious cabins.
8 deluxe cabins which have a queen and single bunk, a private head and shower and one double cabin (#9) with a full and single bunk, private head and shower.
Cabin #9 is located on the dive deck level.
Each stateroom has extra storage and individual climate controls.

There is a beautiful spacious salon, 50’ of sun deck with shading, chaise lounges and deck chairs, bar, grill, and a complete photo/video center.
Palau Aggressor is diesel powered and cruises at 10 knots and has 110 volt power onboard

Palau is a year round destination with something for every season.
While German Channel has many resident Manta Rays, during the mating season, December through March, guests may see as many as 20 – 30 rays!
February and March offer large schools of Moorish Idols, Unicorn Fish and several species of Butterfly Fish.
All year round, the Palau Aggressor crew encounters massive bait balls of scad in and around Ulong and German Channel and on the reefs of Blue Corner and Siaes Corner.

Why you should choose an Aggressor Liveaboard:
The mission of Aggressor Liveaboards is to provide their guests with the highest quality, most innovative and safest trips possible.
They offer unparalleled customer service on their small group adventures, accessing the most exciting destinations around the world to offer the best experience possible.
Read the guest reviews

Palau Aggressor - schedule

Palau Aggressor - Video

Palau Aggressor - Video

Palau Aggressor - prices and what's included

Prices are per person per trip and in USD based on 2 persons sharing a cabin.
Exact pricing is available on the schedule here as prices vary dependant on the time of year, destination and the length of the trip and sometimes special offers are available.

The trip price includes:

Accommodations aboard the yacht
Compressed air tanks, weights & belts
All meals and snacks, non-alcoholic beverages, local beer and wine

The trip price does not include

Airport transfers - Taxis are not readily available at the Koror airport.
All transportation must be pre-arranged. The boat can prearrange transfers through Neco Marine in advance, however these are not included in your charter and must be done in advance:
Airport to Yacht for guest arriving the day of boarding $25 per person (if not transferring from a hotel)
Yacht to Airport, day of disembarkation $25 per person
Hotel to Yacht the day of boarding $5 per person
Yacht to Hotel the day of disembarkation $5 per person (Koror Hotels) - Guests can pay Neco Marine while on the bus or they can pay at the Neco Marine store at the end of their trip.
Airfare (international and domestic)
Equipment rentals
Nitrox fills
Certification or specialty courses
Hotel stays/day roomsDinner on final evening
Crew gratuity
Port/park fees, fuel surcharge, taxes. = USD $240 Port Fee (paid onboard) and a USD $50 departure tax and “Green Fee” (paid in cash at the airport).
MC/Visa accepted onboard.
A single supplement rate is charged 65% of the charter rate for a guaranteed private room.
The 65% is based on the full published price and not available on discounted trip price.

Booking and cancellation Terms and Conditions:

Booking deposit: 50% of your invoice total is required within 7 days of booking to confirm the booking.
The remaining final payment of 50% is due to 90 days prior to the departure date to complete your booking.
Individual booking made less than 90 days before the departure date are due full payment upon booking to confirm your booking.
Cancellation at any stage involves forfeit of the money already payed.

Diving Equipment Rentals (USD) Per week

Full Set (regulator, octopus, BCD, wetsuit, mask, fins, dive computer) $ 175
Regulator with octopus $ 60
Computer $ 60
BCD $ 60
Wetsuit (shorty 3mm) $ 50
Mask / fins / snorkel $ 50
Torch $ 8 per night 100 cubic ft/15L Tank Rentals
The yachts will make every effort to have a 100 cu. ft. tank available when requested but cannot guarantee availability. If the request is met, it will be on a first come first serve basis and there may be a charge for it.

Nitrox Fills and Unlimited Nitrox

Nitrox Student Fills: $80
This includes all nitrox tank fills at 32% beyond the certification level and only available to those who take the course onboard.
price for 7 night charters (10 nights - $130)
Nitrox Unlimited: $100
This includes all Nitrox fills at 32% for certified Nitrox Diver, proof of certification required.
price for 7 night charters (10 nights - $150)
daily rate is pro-rated by diving days

Palau Aggressor - cabins

Palau Aggressor comfortably accommodates 18 guests in 9 spacious cabins.
The cabins include 8 deluxe which have a queen and single bunk and picture window and one double cabin (#9) with a full and single bunk, private head and shower and porthole window looking onto the dive deck.

The Deluxe staterooms (cabins #1-8) on the main deck have a queen size bed and a single bed in bunk style layout with a picture window.

The Double stateroom (cabin #9) located on the dive deck has a double bed and a single bed in bunk style layout and porthole window looking onto the dive deck.

All Staterooms have a private bathroom and shower with hairdryer and individual climate control.

  • Palau Aggressor


  • Palau Aggressor

    Hanging on the sun deck

Palau Aggressor - itineraries

Getting to Palau : updated 28June 2022
As United airlines are still the only main airline into Koror right now, options are limited but they are becoming less so.
Clients from North America can drop in 5 times a week with United via Guam.
Flights from Europe and Australasia can drop in via Manila on Friday only at the moment but this is set to increase to twice a week from August as Tuesday flights are added.

As to the best time to go:
The visibility is pretty amazing all year round, but whilst it is often 40m+ during July to Sept it can drop to around 15-20m due to heavier rains and stronger winds.
Though you can dive in Palau all year round the best conditions exist between Oct/Nov and April.

Sample Itinerary

Sunday – Prearranged pick up from Palau hotels at 4 – 5 pm for transfer to the yacht for boarding.
Guests may board beginning at 4 pm.
Yachts depart dock Monday 6 – 6:30 am.
Monday – Diving begins Monday morning until Saturday noon. Cocktail party at 6 pm with dinner ashore.
Sunday – Check out is at 8:00 am. The crew will assist organizing transportation to either the airport or a local hotel if you are extending your stay.

Top Dive Sites - Palau

Big Drop-Off

Palau Dive SitesA wall dive that begins as shallow as 2’ at low tide and drops to 600’. It is considered by most to be the most beautiful wall dive in Palau because of its abundance of hard and soft corals, seafans, schools of pyramid butterflyfish, and a multitude of tropical reef fish.

Blue Corner

The best known and most highly rated dive site in Micronesia features a shallow coral shelf that projects out into the ocean and has vertical walls on both sides. An upwelling created by the currents attracts schools of fish and large pelagics to the top edges of the walls. The dive is best known for its schools of gray reef sharks that cruise the edge of the wall. Two resident Napoleon wrasses often accompany the divers throughout their dive. Dogtooth tuna, eagle rays, manta rays, white tip and hammerhead sharks, turtles, schooling barracudas, and schools of reef fish populate the site.

Blue Holes

This is a series of four large holes in the top of the reef that converge to form a gigantic underwater chamber. The chamber has a huge opening on a wall that is home to soft corals, sea fans, sea whips and hard corals. Large pelagics often encountered here include tuna, jacks, gray and white tip reef sharks, barracuda and eagle rays. Grouper, Napoleon wrasse, triggerfish, Moorish idols, butterflyfish, anemones and turtles are common at this site, which is situated next to Blue Corner.

Chandelier Caves

A short swim through a tunnel at depth of 35’ opens into a cave consisting of three chambers. Beautiful stalactites formed by water dripping down through the rock island above, hang from the ceilings and give the caves their name. Tiny holes to the outside wood allow fresh air to enter the chambers so that divers can surface and admire the beautiful surroundings.

Denges Passage

This natural channel, situated on Palau’s eastern coast, is home to an entire family of cuttlefish. The uncommon creatures, related to the squid family, are as accommodating to photographers as they are rare. They are not often encountered by divers because of the relatively few locations in he world where they can be found, their ability to remain relatively motionless, and their excellent camouflage.

German Channel

This man-made channel through the southwest side of the barrier reef is home to two diving areas. One site, known as Manta Rock, is a natural cleaning station where giant manta rays come to have their bodies cleansed of parasites and debris by cleaner wrasses. Gray reef sharks also often avail themselves of the wrasses’ services. The area is also inhabited by barracudas, snappers, titan triggerfish, gobies, lionfish, leaffish, and an octopus. Nearby is a coral garden that features crocodile fish, nudibranchs, flatworms, anemones and clownfish.

New Drop-Off

Halfway between Blue Corner and Big Drop-Off, this vertical wall is similar to Blue Corner in that it is a shallow shelf that juts out into the ocean, catching the current and creating an upwelling that attracts schools of pyramid butterflyfish and barracudas, along with a number of gray reef sharks. The steep wall is covered with soft corals and seafans.

Ngedebus Coral Gardens

One of the best collections of hard corals in the Pacific, this dive features a spur and groove reef structure that supports turtles, cuttlefish, anemones, tridacna clams, white tip reef sharks, and thousands of small schooling fish.


The island of Ngerchong, just beyond Denges Passage has two dive sites nearby: Ngerchong Outside and Ngerchong Coral Gardens. Ngerchong Outside is a sloping wall dive featuring sea fans, anemones, soft corals and many hard coral formations. Sharks, bumphead parrotfish, and schooling fish are frequently seen here, as well as an occasional manta ray. The Coral Gardens, also known as Ngerchong Inside, is probably the best dive in Palau for seeing an abundance and variety of hard corals. Table coral, staghorn coral, elkhorn coral, mushroom coral and brain coral are just some of the varieties of corals found here. In addition, many anemones with clownfish, along with cuttlefish, turtles and other fish thrive here. This dive can be enjoyed at any depth between 10’ and 80’.


The island of Peleliu, at the southern tip of the main archipelago of Palau, is bordered by magnificent walls. The dive sites include Peleliu Corner, Yellow Wall, and Orange Beach, among others. Peleliu dive sites are mainly steep walls covered with sea fans, sea whips, hard corals and anemones, but dominated by soft corals. Peleliu is an excellent place to observe large pelagic life, particularly sharks.

Short Drop-Off

A sloping wall just outside the entrance to Koror Harbor that is covered with giant seafans. The top of the wall is a beautiful coral garden loaded with tropical fish and invertebrates.

Siaes Tunnel

An extraordinary deep dive on the west side of the Palau, close to the Ulong Channel. The dive begins on a sheer wall with the opening of the tunnel starting at 70’. You enter through an opening, which is about 50’ across and 20’ high, and swim through the tunnel, which parallels the wall for 150’. The inside of the tunnel is a large cavern with a ceiling at 80-90’ and the floor at 120-130’. Halfway through the tunnel is a “Window” in the wall that looks out onto the deep blue. You exit through a large opening on the wall at 80’. Stingrays, turtles, schools of jacks, and sharks can be seen in and around the tunnel.

Ulong Channel

This channel is located on the west side of Palau, close to Siaes Tunnel and Wall. Its entrance is surrounded by walls that are topped by beautiful coral gardens. On the incoming tide, the mouth of the channel is filled with gray reef sharks. The channel extends for a distance of approximately one-half mile, averaging 100’ in width. The maximum depth is about 60’. Coral covered walls run the length of the channel on either side. A shallow ridge running the center of the channel is blanketed with soft corals, hard corals, sea fans, and anemones. Unique to this site is a huge patch of plate coral resembling lettuce leaves that is home to schools of squirrelfish, soldierfish and glasseyes. The current provides a gentle push, resulting in a beautiful, leisurely ride along the channel.

Wonder Channel

Located within the rock islands just a short distance from Jellyfish Lake and Clam City, this channel is best dived on the east side along a wall that starts at the surface and reaches a depth of 80’. Soft corals, sea fans, anemones, blue and red starfish, crown of thorns star-fish, crabs, pipefish, and a large variety of sea slugs, flat worms and nudibranchs can be found along this wall.

Wreck of the Iro Maru

A 145’ long merchant ship sunk during World War II by American bombers, the Iro Maru sits upright in 120’ of water just 10 minutes south of Koror. Three mast and gun turrets at the bow and stern support a large variety of invertebrates and hard corals. The main deck is at a depth of 80’with open holds containing oil drums and machinery.

Palau Aggressor - specs

The Palau Aggressor II was built to U.S. Coast Guard standards with a full complement of safety equipment.
Length: 106 ft.
Beam: 30
Passengers: 18
Crew: 6

Palau Aggressor - diving

Palau liveaboard diving is consistently chosen as one of the world's premiere diving destinations by several international diving publications, Palau features enchanting topside topography as well as breathtaking underwater landscapes. Experience big fish action at the Blue corner and New drop off. Shafts of light cutting through deep shadows create a near-religious experience at the Blue holes, German channel, Chandelier cave, Pelieu, Siaes tunnel, Ulong channel, Wrecks and many more Palau offers some of the most unique holiday possibilities: its natural beauty and untouched wilderness, intact culture, remoteness and stability combine to offer a fantastic destination for adventure seekers.

The spectacular walls along the barrier reef, including such favorites as Blue Corner, Ulong Channel, Big drop-off and many other sensational offer dive sites yet to be charted. You can expect mostly wall and drift diving with visibility ranging from 20m / 70 feet to 50m / 150 feet depending on prevailing conditions. All our boats are liveaboards for people enthusiastic or serious about their diving but also welcome snorkellers and non-divers who will have their own separate itinerary.

It is located between Guam, the Philippines and Papua New Guinea. Palau is a 400-mile long archipelago, which hosts one of the world's most unique phenomena - " Rock Island". These mushroom like islets are uninhabited and located in a large lagoon that has a vast concentration of corals, fish and other marine life. White sand beaches, lush jungle and remote waterfalls are just among the highlights of Palau.

The islands of Micronesia are scattered over three million square miles of the North Pacific. Palau is the Pacific’s newest nation, a Mecca for divers and home of the exquisite Jellyfish Lake. The Republic of Palau lies east of the Philippines and comprises of some 350 islands. They are grouped in six clusters stretching to 400miles from North to South, Kayangel Atoll to Tobi Islands.

Palau is world renowned as an unsurpassed dive destination that also offers the sublime Rock Islands, dramatic waterfalls, pristine white sand beaches and some of the most intriguing native flora and fauna found anywhere in the Pacific Ocean. Explore the beauty of Palau with the Big Blue explorer.

Palau has been described as one of the Seven Underwater Wonders of the World, with 700 species of coral and 1,200 species of identified fish. Palau provides some of the best diving to be found in Micronesia and ideally is suited for advanced divers.

The spectacular walls along the barrier reef, including such favorites as Blue Corner, Ulong Channel, Big drop-off and many other sensational offer dive sites yet to be charted. You can expect mostly wall and drift diving with visibility ranging from 20m / 70 feet to 50m / 150 feet depending on prevailing conditions.

Palau Aggressor - faqs

Getting to Palau

We recommend that you arrive one night prior to the boat’s departure date, though we remain flexible if this is not possible. Continental Micronesia, a branch of Continental Airlines, holds flights to Palau via Guam (daily) or Manila (Wednesdays and Saturdays). Guam can be reached from Hawaii, Western USA, Australia, Seoul and Tokyo. Manila is a major hub serviced by flights from Singapore, Bangkok, Hong Kong and Kuala Lumpur, amongst others. However, check up-to-date fares and schedules on // Also be sure to check the up-to-date baggage restrictions and requirements for your flight. Occasional direct flights to Palau are available from Taipei. We recommend that you make reservations ahead of time as well as purchase travel insurance in case of last-minutecancellations. We can assist with a special rate for a return flight from Manila to Palau (Manila - Palau - Manila) of $575; the regular rate is $760.

Entry requirements

U.S. citizens must show proof of U.S. citizenship (birth certificate or passport). Non-U.S. citizens must show passport. There is a free 30-day visa issued upon arrival.

Upon arrival

At the Palau airport, you will be picked up by your hotel or the boat representative and transported to the boat dependant on when you arrive.


Bring very casual and lightweight clothing. Quick-dry material or light cotton works well, with maybe one long-sleeved shirt or sweater for chilly nights. We also recommend a waterproof jacket or windbreaker. On the island, dress is very casual, though beachwear in town is inappropriate. We recommend bringing hats,sunscreen and sunglasses.


Palauan and Englishare both official languages. Both are widely spoken.


The U.S. dollar is used throughout Palau. Credit cards are widely accepted. Traveler’s Checks in U.S. dollars can also be widely used as cash or exchanged. There are quite a few 24-hour ATMs in banks on the main road in Koror. Bank of Hawaii and Bank of Guam are represented.


24-hour electricity comes in 110 and 220/240 volts, with standard U.S. outlets for two/three prong plugs.


There is no malaria. We recommend drinking bottled water. The hospital on Palau is the Belau National Hospital, located in Koror. There are also two private clinics. There is a hyperbaric chamber at the Belau National Hospital.

Time zone

Palau, Japan and Korea are 9 hours ahead of GMT (Greenwich Mean Time, in London), Palau = GMT + 9. Central Europe (Geneva, Berlin, Paris) = GMT +1. Eastern Europe = GMT + 2. Moscow = GMT + 3. China, Singapore = GMT + 8. Sydney, Guam = GMT + 10. US Pacific Time = GMT - 8. US Mountain Time = GMT - 7. US Central Standard Time = GMT - 6. US Eastern Time = GMT - 5. (Note: US times advance one hour on summer time, April to October).


Year round our climate is pretty uniform, at an average of 82 degrees F (27 C). Average humidity: 82 %. Rainfall, at 150 inches/year, can occur throughout the year. Though sometimes it rains more during July through October, this “rainy season” doesn’t have a definitive start or end, and the weather is always changing and unpredictable. However, it is always dive-worthy, we have never had to cancel a dive trip!

Departure tax

Upon leaving Palau, there is a departure tax of $20 and $30 Green fee.

Hotel Reservations

Accommodations in Palau range from budget motels to very upscale resorts.

Money Matters

The US Dollar is the official currency of Palau. The majority of established hotels, shops and restaurants accept major credit cards or travelers cheques. Occasionally smaller, family-run business will only accept cash. There are several US operated banks and plenty of ATMs so cash is readily accessible, however the rate of exchange is very poor and guests would be advised to change money prior to arrival in Palau.

Weather and Water Temperature

Palau is 7 degrees north of the equator and enjoys a warm tropical climate year round. Temperatures average 27°C (82°F) and as a tropical island Palau is subject to rainfall throughout the year though more frequently between July and October. Diving is excellent year around though the peak season is considered to be November through May.
The warm tropical waters of Palau are pleasant throughout the year averaging 27°C (82 °F). Most guests will find a 3mm shortie or even a skin suit is appropriate, though if you feel the cold easily you may wish to opt for a 3-5mm long suit.

General and Diving Health

Health care is readily available in Palau. The Belau National Hospital is a professionally staffed hospital with an experienced barotraumas team. Follow normal precautions with food whilst travelling to prevent stomach upsets and be sure to drink bottled water only. On board Palau Siren you will find a fully stocked first aid kit, AED and medical grade O2. Basic supplies will be made available to you, if you require medication please ask your cruise director. For diving related emergencies there is a recompression chamber in Koror. Speedboat evacuation from the boat would be necessary thus diving specific insurance is a must on any liveaboard dive trip.

Language and Religion

Palauan and English are the official languages of the Republic of Palau, though you may hear Tagalog, Japanese and Mandarin too. The population is predominantly Christian and there is approximately 10% of the population adhering to traditional Palauan customs. We recommend our guests are respectful and wear suitable attire when making island tours or visiting religious buildings.

Whilst most dives are suitable for divers of all levels, beginners may find some dives challenging and prefer to skip the dive. Currents are to be expected at sites including Blue Corner and Ulong Channel. your cruise director and dive team will be on hand to advise so you may decided whether the dive is suitable for you. We recommened having advanced experience or taking your PADI course whilst onboard to maximise your enjoyment from the trip.

Are a reef hook and/or surface marker buoy (SMB) necessary items of equipment and can you provide them on board?

It is recommended that each buddy team dive with a SMB in order to signal to the dive tenders you are ready to surface. Some boat traffic is to be expected in busier areas however it is not necessary to drift with your SMB for the entire dive time. SMBs are provided free of charge. Reef hooks are a strongly recommended item and will maximise your enjoyment of dives such as Blue Corner and Siaes Corner. Reef hooks are currently not available for purchase on board so guests are advised to purchase ahead of their trip.


Neco Marine - Transfers:

  • Airport to Yacht for guest arriving the day of boarding $20 per (if not transferring from a hotel)

  • Yacht to Airport, day of disembarkation $20 per person

  • Hotel to Yacht the day of boarding $5 per person

  • Yacht to Hotel the day of disembarkation $5 per person (Koror hotels)

Transfers are provided by Neco Marine.

Guests may pay Neco Marine while on the bus or they can pay at the Neco Marine store at the end of their trip. NO taxis are available at the Koror airport at any time.

All transportation must be pre - arranged. We highly recommend arriving in Palau prior to Sunday to get acclimated to the time change

What time is the embarkation, boarding and departure?

Guests arriving at the Koror (ROR) International Airport on Sunday evening will be greeted by a uniformed crewmember or a Neco Tourist Agent.

There are no phones or taxis at the small airport so we may assist in your transfer to the yacht.

If you are already on island, you may board the Palau Aggressor II at any time after 4 pm on Sunday.

Guests may board the boat up until Monday morning, the boat departs the dock at 6:00 am - 6:30. The Palau Aggressor II docks at the Neco Marine (Malakai) Harbor in Palau. After a week of diving the Palau Aggressor II returns to the dock Saturday afternoon after lunch.

Checkout is Sunday morning at 8 am. The crew will assist organizing transportation to either the airport or a local hotel if you are extending your stay.

Palau is located 900 miles southwest of Guam and 400 miles south of Yap, at the westernmost edge of Micronesia. Palau is north of New Guinea and east of the Philippines. It is surrounded by warm, tropical water with spectacular reefs, walls and wrecks, making Palau a diver’s paradise.

Palau is also very scenic above the water, with azure lagoons and white sandy beaches. The Rock Islands, mushroom shaped limestone formations with rainforest foliage, provide unparalleled tropical beauty.