Ammonite Nautilus Thermo Kit
Ammonite Nautilus Thermo Kit
Ammonite LED Nautilus Focusable Light
Ammonite Nautilus Thermo Kit
Ammonite Nautilus Focusable Light
Ammonite Nautilus Thermo Kit
Ammonite Heavy Duty Case
Ammonite Nautilus Thermo Kit
Ammonite Nautilus Thermo Accu 14
Ammonite Nautilus Thermo Accu 24 Special
Ammonite Nautilus Thermo Accu 24

Ammonite Nautilus Thermo Kit

Sale price£1,728.00

The Ammonite Nautilus Thermo Kit for heating and lighting. The Ammonite Thermo Accu will operate the included Ammonite Nautilus light head and a Santi Heated Vest, Heated Undersuit or Santi Heated Gloves.

Battery Size

Battery Size


Dispatched in 1 to 2 days

Contact Form & Details

How can we help?

If you need to contact us for any issue or assistance, you can do so online by filling out the online Contact Form, emailing us at or calling us on +44(0)1305 824 555. If it's about a purchase you've made for us please also include your order number.

Our brick-and-mortar store Underwater Explorers based on Portland, Dorset is staffed 7 days a week, including weekends and bank holidays. As it's an active store visited by divers from around the country and world regularly, if we can't make it to the phone for any reason please leave a message and we'll get back to you asap.

Any queries are usually answered the very same day and at most within 24 hours.


Why Portland?

We’re located on the Isle of Portland (in Dorset) because Portland has been one of the most popular scuba diving locations in the United Kingdom even before we set up operations here back in the year 2000.

On one side, we’re minutes away from the sheltered waters of Portland Marina and Harbour, while on the other, it’s just a brief walk to reach our famous scuba diving destination Chesil Cove and start of the 16-mile-long Chesil Beach.  

Portland’s location makes it ideal for scuba diving, freediving, snorkelling and other surface water sports activities. 

Check out how many wrecks we have around here by clicking on Scimitar Diving's Wreck & Dive Sites chart!

Alongside dive clubs, many instructors and dive schools travel here to train and offer scuba diving certification ranging from open water diver to mixed-gas tech diving or rebreather diving levels.

Whether you’re doing a boat dive from Portland Marina or Castletown or a shore dive at Chesil Cove, Portland is well known for offering many possibilities: Reef diving to wreck diving and night diving, underwater photography or underwater videography. Anything other than cave diving is possible here.

Likely being the best-stocked diving shop in the UK, at Underwater Explorers we offer in-store scuba diving equipment advice and sales, as well as gas fills, to locals and visitors (read About Us).

But... If you’re googling “scuba diving shop near me” like some, look no further, there's DirDirect online.

Here at DirDirect, we list our cutting-edge equipment for worldwide delivery and we’ve got you covered whatever your level of diving: We’re your local dive store wherever you are in the world.

All that with over 20 years of experience especially in technical diving, from training to equipment, advice and sales.


Underwater Explorers, Unit 1, Maritime Business Centre
Mereside, Portland, Dorset, DT5 1FD


The Ammonite Nautilus Thermo Kit for heating and lighting. The Ammonite Thermo Accu will operate the included Ammonite Nautilus light head and a Santi Heated Vest, Heated Undersuit or Santi Heated Gloves.

Ammonite Nautilus Thermo Kit

Ammonite Nautilus Thermo Kit includes

  • Ammonite Nautilus Light Head with standard light cordAmmonite Thermo Accu (14, 24 or 24 Special) with charger
  • Ammonite Heavy Duty Case

Ammonite Nautilus Light Head

The bright Ammonite Nautilus Focusable Light Kit with 4000-lumen output and operational burn times ranging from 4 to 10 hours allows you to adjust between a tight 9º beam to a perfectly round 45º wide beam, covering any diving condition.

If you’re looking for a bright and durable adjustable beam primary dive light, the Ammonite Nautilus Focusable Light Kit will cover all your needs.

Ammonite Nautilus specifications

Focusable beam Nautilus

From an intense 9º focus to a 45º wide, perfectly round beam, the Ammonite Nautilus Focusable Light Kit was designed with the technical diver in mind for varying demanding conditions.

The Nautilus light head uses the latest Cree CXB LED chip with a Fresnel lens that allows you to make the most out of the impressive 4000-lumen output.

Compact design

The smooth and compact design of the Ammonite Nautilus light head is perfectly balanced, making it easy to operate when in use with or without a Goodman handle. All these features are packed in relatively small housing that’s only 140mm long and 60mm in diameter. Yet while exceptionally durable, the Nautilus light head weighs 415g and 150g underwater.

Durable and reliable

The Ammonite Nautilus light head is built from marine-grade aluminium alloy covered with a hard anode making it resistant to corrosion and mechanical scratches. The 6mm front glass is made of highly fatigue-resistant tempered glass. The Nautilus light head has been extensively tested in use and can safely go down to a depth of 150m.

Easy-to-operate switch knobs are lightweight but very tough and corrosion-resistant polymer (Delrin®).

Nautilus operating times

Ammonite nautilus operating times

Ammonite Accu Thermo

You can choose between three different batteries with the Ammonite Nautilus Thermo Kit. Other than the expected burn times, the specifications for each model are the same. The only exception is the Thermo Accu 24Ah Special, depth rated to 200m instead of 150m.

The Ammonite Accu Thermo is specifically designed as a heating system battery which you can use with any Ammonite primary light head whilst operating a heating system.

Modern power supply source for heated dive wear

Simplicity, intuitive operation and performance reliability; up to 200 Watts heating power. The charging port of Accu Thermo may be optionally applied to connect any of Ammonite dive light heads.

Advanced functions of Accu Thermo

LED Indicator provides information on the battery status and charge level. Intelligent E/O "knows" when the cable is disconnected and when to cut off voltage, as well as when to bring back power supply after reconnecting.

Easy switch and effective adjustment

Two-stage power control means effective power management, extending battery life. The magnetic switch position change is easy to feel, even when wearing thick diving gloves.

The compact size casing is made of high-grade aluminium coated with hard anode while the device is sealed with two o-rings and equipped with a safety valve.

Additional protection and status signalling

The inner microchip system signals low battery level with a strobe flash and automatically switches to back-up mode (light output at 20% light intensity) when the battery is drained.

Ammonite Accu Thermo maximum operating times

Accu Thermo 14

  • Heated Gloves 4hrs 40min
  • Heated Vest 2hrs 40min
  • Heated Vest + Gloves 1hr 45min
  • Heated Undersuit 1hr 20min
  • Heated Undersuit + Gloves 1hr

Accu Thermo 24 & Accu Thermo 24 Special

  • Heated Gloves 8hrs 50min
  • Heated Vest 4hrs 25min
  • Heated Vest + Gloves 2hrs 50min
  • Heated Undersuit 2hrs 10min
  • Heated Undersuit + Gloves 1hr 45min

DirDirect Price Match

Ammonite System is modular

Due to the modular design concept, you can configure your umbilical light set regarding your needs.

All Ammonite umbilical lights, cables, batteries and heating batteries are equipped with the same chinch-type connector. So when one of the parts wears out, or you would want to upgrade it, there are no obstacles to doing so.

Modularity also affects the convenience of use and safety. For example, you can change the broken cable for a new one on the diving spot without sending it to the service centre.

SKU: AMM05-602-014