{"id":987475013,"date":"2024-09-12T14:50:33","date_gmt":"2024-09-12T14:50:33","guid":{"rendered":"https:\/\/courses.asiascubainstructors.com\/lessons\/equipment-3-bcds-and-exposure-suits-copy\/"},"modified":"2025-06-06T03:50:58","modified_gmt":"2025-06-06T03:50:58","slug":"equipment-4-other-equipment","status":"publish","type":"lessons","link":"https:\/\/courses.asiascubainstructors.com\/de\/lessons\/equipment-4-other-equipment\/","title":{"rendered":"Restricted content"},"content":{"rendered":"

[et_pb_section fb_built=”1″ admin_label=”Classes Section” _builder_version=”4.23.1″ _module_preset=”add7fec1-62f1-4656-9396-e46e61dbc3b7″ background_color=”RGBA(255,255,255,0)” custom_margin=”||||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row use_custom_gutter=”on” gutter_width=”1″ make_equal=”on” _builder_version=”4.22.0″ _module_preset=”default” background_color=”#4E70C9″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” max_width=”100%” module_alignment=”center” custom_padding=”3%|3%|3%|3%|true|true” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.22.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.22.0″ _module_preset=”8b1f8231-1210-4c64-bae4-d177be5c655c” text_text_color=”#FFFFFF” header_2_text_color=”#FFFFFF” header_3_text_color=”#FFFFFF” header_4_text_color=”#FFFFFF” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

Equipment<\/h1>\n

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4. Other equipment<\/h2>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row use_custom_gutter=”on” gutter_width=”1″ make_equal=”on” _builder_version=”4.22.0″ _module_preset=”default” background_size=”initial” background_position=”top_left” background_repeat=”repeat” max_width=”100%” module_alignment=”center” custom_padding=”10%||||false|false” use_custom_width=”on” width_unit=”off” custom_width_percent=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” custom_padding=”||||false|false” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.22.0″ _module_preset=”fd3255d4-f6f0-4f87-9821-9341db4eea8f” text_font=”||||||||” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

Depth gauges<\/h3>\n

Open bourdon tube gauges<\/strong> <\/em>contain a c-shaped shaped tube. Water enters the tubes and the increasing pressure causes the tube to straighten. This then moves the depth gauge needle.<\/p>\n

Oil-filled bourdon tube gauges<\/strong><\/em> use a similar principle but here the tube sealed in an oil-filled housing.<\/p>\n

Diaphragm depth gauges<\/strong><\/em> function by connecting a flexible diaphragm to a series of levers and gears that move the display needle. These are more accurate than bourdon tubes but more expensive.<\/p>\n

Capillary depth gauges<\/strong><\/em> are a simple piece of clear tubing, sealed at one end and open at the other. Depth is indicated by how far the water enters the tube. They are inexpensive and reliable but are difficult to read when deeper than 10 metres.
Capillary depth gauges are suitable for altitude diving because at altitude, they will show the theoretical depths<\/strong><\/em> instead of actual depths.<\/p>\n

Electronic depth gauges use a transducer<\/strong><\/em>. This is an electronic component that converts pressure changes into an electric signal.<\/p>\n

Transducers can also be found in divecomputers. Divecomputers not only register dive depth and dive time but also calculate the remaining no-decompression time, based on a mathematical model (algorithm<\/strong><\/em>).<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”3_5,2_5″ make_equal=”on” _builder_version=”4.22.0″ _module_preset=”default” background_size=”initial” background_position=”top_left” background_repeat=”repeat” max_width=”100%” module_alignment=”center” custom_padding=”||||false|false” use_custom_width=”on” width_unit=”off” custom_width_percent=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”3_5″ _builder_version=”4.22.0″ _module_preset=”default” custom_padding=”||||false|false” custom_padding_phone=”|||” custom_padding_last_edited=”off|desktop” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.22.0″ _module_preset=”fd3255d4-f6f0-4f87-9821-9341db4eea8f” custom_padding=”||5%|” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

Submersible Pressure Gauge (SPG)<\/h3>\n

The most common SPG\u2019s work on the same principle as the bourdon tube gauge. High pressure air enters a c\u2013shaped tube and causes it to straighten, causing the needle to move.<\/p>\n

Electronic SPG\u2019s use a transducer similar to those in dive computers and are very accurate.<\/p>\n

Electronic SPG\u2019s and computers can be attached to the high pressure hose or have a hose-less configuration with a transmitter<\/strong><\/em> attached to the first stage.<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”2_5″ _builder_version=”4.22.0″ _module_preset=”default” custom_padding=”||||false|false” custom_padding_phone=”10%|||0px” custom_padding_last_edited=”off|desktop” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/courses.asiascubainstructors.com\/wp-content\/uploads\/2024\/09\/spg.jpg” force_fullwidth=”on” align_tablet=”center” align_phone=”” align_last_edited=”on|desktop” _builder_version=”4.16″ _module_preset=”default” animation_style=”fade” animation_delay=”500ms” global_colors_info=”{}” theme_builder_area=”post_content”]   [\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_3,2_3″ make_equal=”on” _builder_version=”4.22.0″ _module_preset=”default” background_size=”initial” background_position=”top_left” background_repeat=”repeat” max_width=”100%” module_alignment=”center” custom_padding=”||||false|false” use_custom_width=”on” width_unit=”off” custom_width_percent=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”1_3″ _builder_version=”4.16″ _module_preset=”default” custom_padding=”|||0px” custom_padding_tablet=”” custom_padding_phone=”|||0px” custom_padding_last_edited=”on|desktop” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/courses.asiascubainstructors.com\/wp-content\/uploads\/2024\/09\/diving-compass.jpg” force_fullwidth=”on” align_tablet=”center” align_phone=”” align_last_edited=”on|desktop” _builder_version=”4.16″ _module_preset=”default” animation_style=”fade” animation_delay=”500ms” global_colors_info=”{}” theme_builder_area=”post_content”]   [\/et_pb_image][\/et_pb_column][et_pb_column type=”2_3″ _builder_version=”4.16″ _module_preset=”default” custom_padding=”||||false|false” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.22.0″ _module_preset=”fd3255d4-f6f0-4f87-9821-9341db4eea8f” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

Compasses<\/h3>\n

The needle<\/strong><\/em> of the compass is a magnet so it always points to magnetic north.
Diving compasses are oil-filled so the housing can withstands the pressure, this also dampens the needle movement for easier reading. A straight line on the compass indicates the direction of travel and is called the lubberline<\/strong><\/em>. The course is set by turning the bezel<\/strong><\/em> so that the markings line up with the north arrow.
Electronic compasses are generally integrated into dive computers<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”3_5,2_5″ make_equal=”on” _builder_version=”4.22.0″ _module_preset=”default” background_size=”initial” background_position=”top_left” background_repeat=”repeat” max_width=”100%” module_alignment=”center” custom_padding=”||||false|false” hover_enabled=”0″ use_custom_width=”on” width_unit=”off” custom_width_percent=”100%” global_colors_info=”{}” theme_builder_area=”post_content” sticky_enabled=”0″][et_pb_column type=”3_5″ _builder_version=”4.22.0″ _module_preset=”default” custom_padding=”||||false|false” custom_padding_phone=”|||” custom_padding_last_edited=”off|desktop” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.22.0″ _module_preset=”fd3255d4-f6f0-4f87-9821-9341db4eea8f” custom_padding=”||5%|” hover_enabled=”0″ global_colors_info=”{}” theme_builder_area=”post_content” sticky_enabled=”0″]<\/p>\n

Instrument consoles<\/h3>\n

In the early days of diving, instruments could only be worn on the wrist. Nowadays it is common to use an instrument console<\/strong><\/em>.<\/p>\n

An instrument console combines several gauges in one package and keeps your arms clear to make it easier and quicker to get into your dive equipment.<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”2_5″ _builder_version=”4.22.0″ _module_preset=”default” custom_padding=”||||false|false” custom_padding_phone=”10%|||0px” custom_padding_last_edited=”off|desktop” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/courses.asiascubainstructors.com\/wp-content\/uploads\/2025\/06\/diving-equipment-console.jpg” force_fullwidth=”on” align_tablet=”center” align_phone=”” align_last_edited=”on|desktop” _builder_version=”4.22.0″ _module_preset=”default” animation_style=”fade” animation_delay=”500ms” hover_enabled=”0″ global_colors_info=”{}” theme_builder_area=”post_content” alt=”diving equipment console” title_text=”diving equipment console” sticky_enabled=”0″]   [\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row make_equal=”on” _builder_version=”4.22.0″ _module_preset=”default” background_size=”initial” background_position=”top_left” background_repeat=”repeat” max_width=”100%” module_alignment=”center” custom_padding=”||||false|false” use_custom_width=”on” width_unit=”off” custom_width_percent=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” custom_padding=”||||false|false” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.22.0″ _module_preset=”fd3255d4-f6f0-4f87-9821-9341db4eea8f” text_font=”||||||||” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

Weight systems<\/h3>\n

Weights can be carried on a weight belt or in pouches that are integrated in the BCD. The most important feature of a weight system is the quick release<\/strong> <\/em>system.<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”3_5,2_5″ make_equal=”on” _builder_version=”4.22.0″ _module_preset=”default” background_size=”initial” background_position=”top_left” background_repeat=”repeat” max_width=”100%” module_alignment=”center” custom_padding=”||||false|false” use_custom_width=”on” width_unit=”off” custom_width_percent=”100%” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”3_5″ _builder_version=”4.16″ _module_preset=”default” custom_padding=”||||false|false” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.22.0″ _module_preset=”fd3255d4-f6f0-4f87-9821-9341db4eea8f” custom_padding=”||5%|” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

Surface Marker Buoys<\/h3>\n

A Surface Marker Buoy (SMB)<\/strong><\/em> can be deployed by a diver on the surface to warn boat traffic or it can be attached to a line and reel to be towed by a diver during a drift dive.<\/p>\n

A Delayed Surface Marker Buoy (DSMB)\u00a0<\/strong><\/em>can be deployed from underwater. It has a closed construction that prevents air from leaking out and is equipped with an over-pressure valve that prevents the buoy from rupturing by expanding air when the buoy ascends to the surface.<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”2_5″ _builder_version=”4.16″ _module_preset=”default” custom_padding=”|0px||5%” custom_padding_tablet=”” custom_padding_phone=”10%|||0px” custom_padding_last_edited=”on|phone” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/courses.asiascubainstructors.com\/wp-content\/uploads\/2024\/09\/surface-marker-buoy.jpg” force_fullwidth=”on” align_tablet=”center” align_phone=”” align_last_edited=”on|desktop” _builder_version=”4.16″ _module_preset=”default” animation_style=”fade” animation_delay=”500ms” global_colors_info=”{}” theme_builder_area=”post_content”]   [\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.22.0″ _module_preset=”default” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.22.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.22.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n