sandbox: Journal 134 has gone to press and is due for publication in June 2026
CREG Journal 134 (0-24)
This issue has a cover date of June 2026 and was published on 1 June 2026.

Front Cover (1)
Tomasz Paw&lstrok;owski, STJ KW Krak&oacute;w Poland, with wearable lidar-based surveying device in Jaskinia Zimna. Photo: <span class="author">Tomasz Paw&lstrok;owski</span>

Contents (2)
List of contents and masthead information.

News and Notes (2)
Style Guide and Submissions Guidelines, CREG Seminars, Hidden Earth 2026, Editorial Team.

Wearable Mobile Mapping System for Cave Surveying - Part 1 (3-6)
<span class="author">Janusz Be&#807;dkowski</span>, <span class="author">Micha&lstrok; Pe&lstrok;ka</span> and <span class="author">Tomasz Paw&lstrok;owski</span> introduce a wearable mobile mapping system for cave surveying composed of two rigidly assembled 3D lidars. The system is mountable on the shoulder, thus enabling safe use while climbing and crawling, even in extremely tiny spaces. This is provided as an open-source project.

A Technical Expos&eacute; of the new Nicola 4 Cave Radio (7-9)
<span class="author">Graham Naylor</span> and <span class="author">Pete Allwright</span> present the architecture of the Nicola 4, with particular emphasis on the potential of this software-defined cave radio as a platform for developing new functionality.

DiscoX: A New High-performance Standalone Electronic Surveying Device for DIY Construction (10-13)
In recent years, electronic cave surveying devices have moved from add-ons for Leica distance meters to standalone units, but these have tended to be proprietary products. By way of contrast, the DiscoX is available for DIY construction and offers advanced features, as <span class="author">Brendan Hall</span> reports.

Correction	(13)
Tuned Loop Antenna Matching Made Easy, <span class="author">Brian Pease</span>, CREGJ 132, pp. 19-21

Minimally Invasive Cave Exploration With a "Speleoscope" (14-15)
<span class="author">Michael Ross</span> describes a method for the exploration of cavities behind narrow fissures or small holes using a modified pipe camera.

Meshocan, a Scalable Wireless Communication System for Use in Caving and Cave Rescue (16-19)
<span class="author">Mart&iacute;n Hierro</span> describes his Meshocan network for communication in caves using inexpensive non-proprietary LoRa repeaters.

Hidden Rivers of the North: Remote Sensing in the K&auml;sivarsi Wilderness (20-21)
<span class="author">Jarmo Ruuth</span>, <span class="author">Jari Arkko</span>, and <span class="author">Duncan Simey</span> of the Finnish Caving Society ask whether a massive, undiscovered cave system lies hidden beneath the limestone layers of Finland's far north. They proceed to describe how they've processed and analysed large volumes of satellite imagery, geological surveys, and meteorological data, in an attempt to answer this question.

Pinger 2.0: A New Radiolocation Receiver - Part 2 (22-24)
Following their introduction to the new Pinger 2.0 radiolocation receiver and discussion of the associated coil options in the previous issue, <span class="author">Ken Smith</span> and <span class="author">Aren Leishman</span> provide constructional details.