{"id":987475098,"date":"2024-09-15T10:29:08","date_gmt":"2024-09-15T10:29:08","guid":{"rendered":"https:\/\/courses.asiascubainstructors.com\/lessons\/decompression-theory-and-rdp-3-how-to-use-the-rdp-copy\/"},"modified":"2024-09-17T16:17:09","modified_gmt":"2024-09-17T16:17:09","slug":"decompression-theory-and-rdp-4-how-to-use-the-erdpml","status":"publish","type":"lessons","link":"https:\/\/courses.asiascubainstructors.com\/de\/lessons\/decompression-theory-and-rdp-4-how-to-use-the-erdpml\/","title":{"rendered":"Restricted content"},"content":{"rendered":"

[et_pb_section fb_built=”1″ admin_label=”Classes Section” _builder_version=”4.23.1″ _module_preset=”2fe31fc0-c6cb-4cdc-be65-5cba107172ab” 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

Decompression theory and the RDP<\/h1>\n

 <\/p>\n

4. How to use the eRDPml<\/h2>\n

[\/et_pb_text][\/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=”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=”40f87f69-68a0-4a74-8d3a-23f3acd6bdad” text_font=”||||||||” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

The eRDPml<\/h3>\n

The eRDPml uses exactly the same calculations as the RDP table. However, with the eRDPml you don’t have to round to the next available number on the table. For instance, with the RDP you can not plan a dive to 17 meters because this value is not available in the table.<\/p>\n

The eRDPml also makes it easier to calculate multilevel dives, hence the name E<\/strong>lectronic RDP<\/strong> for M<\/strong>ulti L<\/strong>evel dives.<\/p>\n

The eRDPml is available as a calculator and as an app for your tablet, phone or laptop. There may be slight differences in button text and layout but the operation is the same.<\/p>\n

ON\/Off:<\/strong> Press the ON key for 2 seconds to turn it on or off.
Mode\/Reset:<\/strong> Switch between planning modes like Dive Planning, Surface Interval, and Maximum Depth \/ Press for 2 seconds to reset.
Yes\/No keys:<\/strong> Respond to yes\/no prompts on the screen.
Alpha\/Numeric keys:<\/strong> Enter numbers and letters for depth, time, etc.
Sound:<\/strong> Activate or deactivate key sounds.<\/p>\n

<\/span><\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.22.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”1_2″ _builder_version=”4.22.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/courses.asiascubainstructors.com\/wp-content\/uploads\/2024\/09\/PADI-eRDPml.png” alt=”erdpml calculator” title_text=”PADI-eRDPml” _builder_version=”4.22.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.22.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/courses.asiascubainstructors.com\/wp-content\/uploads\/2024\/09\/erdpml.jpg” alt=”erdpml” title_text=”erdpml” _builder_version=”4.22.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][\/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=”40f87f69-68a0-4a74-8d3a-23f3acd6bdad” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

Finding Your No Decompression Limit (NDL)<\/h3>\n
    \n
  1. Turn on the eRDPML.<\/li>\n
  2. Press Mode\/Reset<\/strong> until “Dive Planning” appears.<\/li>\n
  3. Press Enter<\/strong> to confirm Dive Planning mode.<\/li>\n
  4. When prompted for “Multilevel dive?”, press No<\/strong> for a single-depth dive.<\/li>\n
  5. When asked if it’s your first dive<\/strong>, press Yes<\/strong>.<\/li>\n
  6. Enter your planned dive depth using the numeric keys, then press Enter<\/strong>.<\/li>\n
  7. The eRDPML will display your NDL in minutes.<\/li>\n<\/ol>\n

     <\/p>\n

    Calculating Your Pressure Group After a Dive<\/h3>\n
      \n
    1. Follow the steps to find your NDL, as explained in the previous step.<\/li>\n
    2. After the NDL appears, press Enter<\/strong>.<\/li>\n
    3. Enter your Actual Bottom Time (ABT)<\/strong> in minutes (how long you spent underwater) and press Enter<\/strong>.<\/li>\n
    4. The device will show your Pressure Group After Dive<\/strong>.<\/li>\n<\/ol>\n

       <\/p>\n

      Finding Your New Pressure Group After a Surface Interval<\/h3>\n
        \n
      1. After your Pressure Group appears, press Enter<\/strong>.<\/li>\n
      2. The eRDPML prompts you to enter your Surface Interval<\/strong> in hours and minutes.<\/li>\n
      3. Enter the interval and press Enter<\/strong>.<\/li>\n
      4. The eRDPML will show your new pressure group<\/strong> after the surface interval.<\/li>\n<\/ol>\n

         <\/p>\n

        Finding Your Adjusted No Decompression Limit (ANDL) for Repetitive Dives<\/h3>\n
          \n
        1. Follow the steps to calculate the Pressure Group for your first dive.<\/li>\n
        2. After your Pressure Group shows up, press Enter<\/strong>.<\/li>\n
        3. Enter the depth of your repetitive dive<\/strong> and press Enter<\/strong>.<\/li>\n
        4. The eRDPML will display the Adjusted NDL (ANDL)<\/strong> based on your previous dive.<\/li>\n<\/ol>\n

           <\/p>\n

          You can continue this process to plan more repetitive dives. To avoid getting confused, it helps to draw a dive profile.<\/p>\n

          [\/et_pb_text][\/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_image src=”https:\/\/courses.asiascubainstructors.com\/wp-content\/uploads\/2024\/09\/dive-profile.png” alt=”dive profile” title_text=”dive profile” _builder_version=”4.22.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][\/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=”40f87f69-68a0-4a74-8d3a-23f3acd6bdad” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

          Using the Dive Planning Mode Mid-Profile<\/h3>\n

          Imagine you have used the eRDPml to plan your first dive. You are now back on the surface and planning your second dive. You don’t have to enter all information from the start.\u00a0<\/p>\n

            \n
          1. Turn on the eRDPML<\/strong> and select the Dive Planning Mode<\/strong>.<\/li>\n
          2. Press No<\/strong> when prompted for a multilevel dive.<\/li>\n
          3. Press No<\/strong> for the first dive.<\/li>\n
          4. The eRDPML displays PG AFTER SI Y\/N.<\/li>\n
          5. Press Yes<\/strong> if you know the Pressure Group after the Surface Interval. After entering the Pressure Group you can continue as before.<\/li>\n
          6. Press No<\/strong> if you don’t know the Pressure Group after the Surface Interval.\u00a0The eRDPML displays PG BEFORE SI Y\/N. Enter the Pressure Group before the Surface Interval (after the first dive) and then enter your Surface Interval. Continue as before.<\/li>\n<\/ol>\n

             <\/p>\n

            Special Rules\u00a0<\/h3>\n

            The eRDPml uses excactly the same special rules as the RDP table. On the calculator you can find these on the inside of the cover. On the app you can find these by clicking on the RULES tab.<\/p>\n

            Multiple Repetitive Dives (WXYZ rule)<\/strong><\/p>\n

            If you\u2019re planning 3 or more dives, and you enter an actual dive time that puts you in pressure groups W, X, Y or Z, the eRDPML will prompt you to consult this rule.<\/p>\n

            [\/et_pb_text][\/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=”40f87f69-68a0-4a74-8d3a-23f3acd6bdad” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

            Planning Multi Level dives<\/h3>\n

            The eRDPml allows you to plan for multiple depths during the same dive. For instance you could plan to stay 14 minutes at 18 meters and then shallow up to 12 meters for 20 minutes.<\/p>\n

             <\/p>\n

              \n
            1. Turn on the eRDPML<\/strong> and select the Dive Planning Mode<\/strong>.<\/li>\n
            2. Press Yes<\/strong> when prompted for a multilevel dive.<\/li>\n
            3. Press Yes<\/strong> for the first dive.<\/li>\n
            4. The eRDPML displays ENTER LVL 1.<\/li>\n
            5. Enter the depth for level 1. The eRDPml will show the NDL in minutes. Press Enter<\/strong> to confirm.<\/li>\n
            6. Enter the planned time at this depth. The eRDPml will show Pressure Group after level 1.<\/li>\n
            7. Press Enter<\/b> to confirm and enter the depth for level 2. The eRDPml will show the Multilevel Limit<\/strong> in minutes (ML).<\/li>\n
            8. Press Enter<\/strong> to confirm and continue as before.<\/li>\n<\/ol>\n

              Again, it helps to draw a dive profile.<\/p>\n

              [\/et_pb_text][\/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_image src=”https:\/\/courses.asiascubainstructors.com\/wp-content\/uploads\/2024\/09\/multilevel-dive-profile.png” alt=”multilevel dive profile” title_text=”multilevel dive profile” _builder_version=”4.22.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][\/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=”40f87f69-68a0-4a74-8d3a-23f3acd6bdad” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

              Finding a Minimum Surface Interval<\/h3>\n

              To find the minimum surface interval by planning both dive depths and times prior to the first dive:<\/p>\n

                \n
              1. Turn on the eRDPML<\/strong> and select the Surface Interval Mode<\/strong>.<\/li>\n
              2. Press Yes<\/strong> for the first dive.<\/li>\n
              3. Enter the planned depth and time for dive 1.<\/li>\n
              4. Enter the planned depth for dive 2. The eRDPml will show the ANDL in minutes.<\/li>\n
              5. Press Enter<\/strong> to confirm and Enter the planned bottom time for dive 2. The eRDPml will show the Minimum Surface Interval <\/strong>in hours and minutes.<\/li>\n<\/ol>\n

                To find the minimum surface interval by entering the Pressure Group after the first dive:<\/p>\n

                 <\/p>\n

                  \n
                1. Turn on the eRDPML<\/strong> and select the Surface Interval Mode<\/strong>.<\/li>\n
                2. Press No<\/strong> for the first dive.<\/li>\n
                3. Enter the Pressure Group after dive 1.\u00a0<\/li>\n
                4. Enter the planned depth for dive 2. The eRDPml will show the ANDL in minutes.<\/li>\n
                5. Press Enter<\/strong> to confirm and Enter the planned bottom time for dive 2. The eRDPml will show the Minimum Surface Interval<\/strong> in hours and minutes.<\/li>\n<\/ol>\n

                  [\/et_pb_text][et_pb_text _builder_version=”4.22.0″ _module_preset=”40f87f69-68a0-4a74-8d3a-23f3acd6bdad” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

                  Finding the Maximum Depth<\/h3>\n

                  To find the maximum depth on your the first dive:<\/p>\n

                    \n
                  1. Turn on the eRDPML<\/strong> and select the Maximum Depth Mode<\/strong>.<\/li>\n
                  2. Press Yes<\/strong> for the first dive.<\/li>\n
                  3. Enter the planned dive time for your dive.<\/li>\n
                  4. The eRDPml will show the Maximun Depth<\/strong> for this dive.<\/li>\n<\/ol>\n

                    To find the maximum depth for a repetitive dive:<\/p>\n

                      \n
                    1. Turn on the eRDPML<\/strong> and select the Maximum Depth Mode<\/strong>.<\/li>\n
                    2. Press No<\/strong> for the first dive.<\/li>\n
                    3. Enter the Pressure Group after surface interval.<\/li>\n
                    4. Enter the planned time for dive 2. The eRDPml will show the Maximum Depth<\/strong> for this dive.<\/li>\n<\/ol>\n

                      [\/et_pb_text][\/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