Hollis Rebreathers Blog

Scuba Franny's Expedition Re-cap

Written by Francheska "Scuba Franny" Krysiak Mesophotic and Deep Benthic Communities Project JUNE 2024 | GULF OF MEXICO, U.S.A. DIVING DEEP IN THE NAME OF RESTORATION Unprecedented in both scope and nature, the Deepwater Horizon oil spill in the Gulf of Mexico was the largest in U.S. history. In April...

Rebreather/Advanced Rebreather Recreational CCR Courses on the Prism 2

There are many divers who would like to experience the advantages a CCR has to offer while staying within recreational diving limits.

First-Time Rebreather Divers Blog Post Header, Image by Adam Beard Photography

Top Tips for First-Time Rebreather Liveaboard Divers

We’ve teamed up with The Dirty Dozen Expeditions to offer you some essential tips for first-time CCR liveaboard divers

Product Service Update for Petrel 3

Petrel 3 Product Service Bulletin

TO: SHEARWATER RESEARCH REBREATHER PRODUCT CUSTOMERS RE: Petrel 3 Product Service Bulletin Introduction IMPORTANT WARNING – per the Shearwater Research product manual: This computer will fail. It is not whether it will fail but when it will fail. Do not depend on it. Always have a plan for how to handle failures. Automatic systems are no substitute...

PRISM 2 Service Guide Blog Post Header

Updated Prism 2 Technician Service Guide

This guide provides procedures for proper repair of the Hollis PRISM 2 Rebreather at the time of this writing (August 9, 2024). This guide does not replace proper instruction from a Hollis Service Seminar Instructor. Instructions contained within this guide are only to be performed by authorized and trained personnel. Before service, ensure with Hollis...

T-Piece Inner Retaining Ring Quality Alert HR.0004

Due to reports of the original BMCL inner retaining ring experiencing failures during normal operation, we are advising all users to immediately stop using the inner 26203 plastic snap ring and upgrade to the new 26260 stainless steel version.

BMCL Inner Bladder Replacement

Date: 9/26/2023 Bulletin: Quality Alert HR.0003 Author: Nick Hollis Title: BMCL Inner Bladder Replacement Part Numbers:220.9501 220.9502 220.9503 Due to reports of the original BMCL inner polyurethane bladders failing during normal operation, we are advising all users to immediately stop using the polyurethane version and upgrade to the latest 420D nylon version. This change will...

Hollis Rebreathers Quality Alert HR.001, Electronics Cover

Electronics Cover – 28990

Date: 11/30/17Bulletin: Quality Alert HR.0001Author: Nick HollisTitle: Electronics Cover - 28990Part Number: 28990 Purpose of Notice: It has come to our attention that the Electronics Cover - 28990 found on the Prism 2 Rebreather could be subject to corrosion under certain diving conditions, primarily in salt water. Affected battery covers were manufactured between January 2012...

Jill Heinerth header image - how to calibrate your Prism 2 Rebreather

Jill Heinerth: How to Calibrate Your PRISM 2 Rebreather

People often ask me how to calibrate a PRISM 2 Rebreather. Proper calibration ensures you are referencing an accurate PO2 reading. It is one of the most critical procedures for preparing a rebreather. Each time you calibrate your rig, you are teaching the unit to read PO2 correctly. A particular oxygen fraction is applied to...

Why Dive a Hollis Rebreathers Prism 2 Rebreather?

Why Dive PRISM 2? Nick Hollis Explains

The PRISM 2 is a simple and reliable rebreather that can be used for all types of diving from the shallowest photography dives to the deepest exploration dives. P2 owners are the silent stormtroopers of the underwater world. On a recent liveaboard trip (pre-Covid) there were a number of rebreathers from different manufacturers and a...

Hollis Rebreathers