diff --git a/Changes.md b/Changes.md
index 90d5e1d..f7a9fd6 100644
--- a/Changes.md
+++ b/Changes.md
@@ -1,6 +1,14 @@
 Version Information
 ===================
 
+Version 404.1.1 - 22/09/2024
+----------------------------
+1. Show section zero if the section has meaningful content.
+2. Fix single section page navigation.
+3. Compromise with the Course Index that it will always refer to the main course page and the format
+   implement its own single page access and navigation.
+4. Fix single section page navigation visibility.
+
 Version 404.1.0 - 01/07/2024
 ----------------------------
 1. Fix 'Error with Orphaned Sections when editing' - #151.
diff --git a/classes/output/courseformat/content/sectionnavigation.php b/classes/output/courseformat/content/sectionnavigation.php
index 2ef537d..059ff9c 100644
--- a/classes/output/courseformat/content/sectionnavigation.php
+++ b/classes/output/courseformat/content/sectionnavigation.php
@@ -68,26 +68,26 @@ public function export_for_template(\renderer_base $output): \stdClass {
 
         $back = $this->sectionno - 1;
         while ($back > 0 && empty($data->previousurl)) {
-            if ($canviewhidden || $sections[$back]->uservisible) {
+            if ($canviewhidden || $format->is_section_visible($back)) {
                 if (!$sections[$back]->visible) {
                     $data->previoushidden = true;
                 }
                 $data->previousname = get_section_name($course, $sections[$back]);
-                $data->previousurl = course_get_url($course, $back, ['navigation' => true]);
+                $data->previousurl = $format->get_view_url($back, ['navigation' => false]);
                 $data->hasprevious = true;
             }
             $back--;
         }
 
         $forward = $this->sectionno + 1;
-        $numsections = course_get_format($course)->get_last_section_number();
+        $numsections = $format->get_last_section_number();
         while ($forward <= $numsections && empty($data->nexturl)) {
-            if ($canviewhidden || $sections[$forward]->uservisible) {
+            if ($canviewhidden || $format->is_section_visible($forward)) {
                 if (!$sections[$forward]->visible) {
                     $data->nexthidden = true;
                 }
                 $data->nextname = get_section_name($course, $sections[$forward]);
-                $data->nexturl = course_get_url($course, $forward, ['navigation' => true]);
+                $data->nexturl = $format->get_view_url($forward, ['navigation' => false]);
                 $data->hasnext = true;
             }
             $forward++;
diff --git a/classes/output/courseformat/content/sectionselector.php b/classes/output/courseformat/content/sectionselector.php
index 1e8608b..4d42b85 100644
--- a/classes/output/courseformat/content/sectionselector.php
+++ b/classes/output/courseformat/content/sectionselector.php
@@ -64,9 +64,11 @@ public function export_for_template(\renderer_base $output): \stdClass {
         $numsections = $format->get_last_section_number();
         while ($section <= $numsections) {
             $thissection = $modinfo->get_section_info($section);
-            $url = course_get_url($course, $section, ['navigation' => true]);
-            if ($thissection->uservisible && $url && $section != $data->currentsection) {
-                $sectionmenu[$url->out(false)] = get_section_name($course, $section);
+            $url = $format->get_view_url($section, ['navigation' => false]);
+            if ($url && $section != $data->currentsection) {
+                if ($format->is_section_visible($thissection)) {
+                    $sectionmenu[$url->out(false)] = get_section_name($course, $section);
+                }
             }
             $section++;
         }
@@ -76,6 +78,7 @@ public function export_for_template(\renderer_base $output): \stdClass {
         $select->formid = 'sectionmenu';
 
         $data->selector = $output->render($select);
+
         return $data;
     }
 }
diff --git a/lib.php b/lib.php
index 64725e8..f53b6b3 100644
--- a/lib.php
+++ b/lib.php
@@ -270,26 +270,29 @@ public function is_section_visible(section_info $section): bool {
         }
         $shown = parent::is_section_visible($section);
         if (($shown) && ($section->sectionnum == 0)) {
-            // Don't show section zero if no modules or all modules unavailable to user.
-            $showmovehere = ismoving($this->course->id);
-            if (!$showmovehere) {
-                global $PAGE;
-                $context = context_course::instance($this->course->id);
-                if (!($PAGE->user_is_editing() && has_capability('moodle/course:update', $context))) {
-                    $modshown = false;
-                    $modinfo = get_fast_modinfo($this->course);
-
-                    if (!empty($modinfo->sections[$section->section])) {
-                        foreach ($modinfo->sections[$section->section] as $modnumber) {
-                            $mod = $modinfo->cms[$modnumber];
-                            if ($mod->is_visible_on_course_page()) {
-                                // At least one is.
-                                $modshown = true;
-                                break;
+            // Show section zero if summary has content, otherwise check modules.
+            if (empty(strip_tags($section->summary))) {
+                // Don't show section zero if no modules or all modules unavailable to user.
+                $showmovehere = ismoving($this->course->id);
+                if (!$showmovehere) {
+                    global $PAGE;
+                    $context = context_course::instance($this->course->id);
+                    if (!($PAGE->user_is_editing() && has_capability('moodle/course:update', $context))) {
+                        $modshown = false;
+                        $modinfo = get_fast_modinfo($this->course);
+
+                        if (!empty($modinfo->sections[$section->section])) {
+                            foreach ($modinfo->sections[$section->section] as $modnumber) {
+                                $mod = $modinfo->cms[$modnumber];
+                                if ($mod->is_visible_on_course_page()) {
+                                    // At least one is.
+                                    $modshown = true;
+                                    break;
+                                }
                             }
                         }
+                        $shown = $modshown;
                     }
-                    $shown = $modshown;
                 }
             }
         }
@@ -417,11 +420,9 @@ public function get_view_url($section, $options = []) {
             $sectionno = $section;
         }
         if ((!empty($options['navigation'])) && $sectionno !== null) {
-            // Display section on separate page.
-            $sectioninfo = $this->get_section($sectionno);
-            return new moodle_url('/course/section.php', ['id' => $sectioninfo->id]);
-        }
-        if ($this->uses_sections() && $sectionno !== null) {
+            // Unlike core, navigate to section on course page.
+            $url->set_anchor('section-'.$sectionno);
+        } else if ($this->uses_sections() && $sectionno !== null) {
             if ($this->coursedisplay == COURSE_DISPLAY_MULTIPAGE) {
                 $url->param('section', $sectionno);
             } else {
diff --git a/version.php b/version.php
index 7b7104e..3795c62 100644
--- a/version.php
+++ b/version.php
@@ -30,9 +30,9 @@
  */
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version = 2024032802;
+$plugin->version = 2024032803;
 $plugin->maturity = MATURITY_STABLE;
 $plugin->requires = 2024042200.00; // 4.4 (Build: 20240422).
 $plugin->supported = [404, 404];
 $plugin->component = 'format_topcoll';
-$plugin->release = '404.1.0';
+$plugin->release = '404.1.1';