diff --git a/rdmo/projects/progress.py b/rdmo/projects/progress.py
index 6271c11bbd..1afe1049f4 100644
--- a/rdmo/projects/progress.py
+++ b/rdmo/projects/progress.py
@@ -6,10 +6,7 @@
 from rdmo.questions.models import Catalog, Section, Page, QuestionSet, Question
 
 
-def compute_progress(project, snapshot=None):
-    # get all values for this project and snapshot
-    project_values = project.values.filter(snapshot=snapshot).select_related('attribute', 'option')
-
+def resolve_conditions(project, values):
     # get all conditions for this catalog
     pages_conditions_subquery = Page.objects.filter_by_catalog(project.catalog).filter(conditions=OuterRef('pk'))
     questionsets_conditions_subquery = QuestionSet.objects.filter_by_catalog(project.catalog).filter(conditions=OuterRef('pk'))
@@ -24,24 +21,88 @@ def compute_progress(project, snapshot=None):
     # evaluate conditions
     conditions = set()
     for condition in catalog_conditions:
-        if condition.resolve(project_values):
+        if condition.resolve(values):
             conditions.add(condition.id)
 
-    # compute sets from values
+    # return all true conditions for this project
+    return conditions
+
+
+def compute_sets(values):
     sets = defaultdict(list)
-    for attribute, set_index in project_values.values_list('attribute', 'set_index').distinct():
+    for attribute, set_index in values.values_list('attribute', 'set_index').distinct():
         sets[attribute].append(set_index)
+    return sets
+
+
+def compute_navigation(section, project, snapshot=None):
+    # get all values for this project and snapshot
+    values = project.values.filter(snapshot=snapshot).select_related('attribute', 'option')
+
+    # get true conditions
+    conditions = resolve_conditions(project, values)
+
+    # compute sets from values
+    sets = compute_sets(values)
+
+    # query non empty values
+    values_list = values.exclude((Q(text='') | Q(text=None)) & Q(option=None) &
+                                 (Q(file='') | Q(file=None))) \
+                        .values_list('attribute', 'set_index').distinct() \
+                        .values_list('attribute', flat=True)
+
+    navigation = []
+    for catalog_section in project.catalog.elements:
+        navigation_section = {
+            'id': catalog_section.id,
+            'title': catalog_section.title,
+            'first': catalog_section.elements[0].id if section.elements else None
+        }
+        if catalog_section.id == section.id:
+            navigation_section['pages'] = []
+            for page in catalog_section.elements:
+                pages_conditions = set(page.id for page in page.conditions.all())
+                show = bool(not pages_conditions or pages_conditions.intersection(conditions))
+
+                # count the total number of questions, taking sets and conditions into account
+                total, attributes = count_questions(page, sets, conditions)
+
+                # filter the project values for the counted questions and exclude empty values
+                count = len(tuple(filter(lambda attribute: attribute in attributes, values_list)))
+
+                navigation_section['pages'].append({
+                    'id': page.id,
+                    'title': page.title,
+                    'show': show,
+                    'count': count,
+                    'total': total
+                })
+
+        navigation.append(navigation_section)
+
+    return navigation
+
+
+def compute_progress(project, snapshot=None):
+    # get all values for this project and snapshot
+    values = project.values.filter(snapshot=snapshot).select_related('attribute', 'option')
+
+    # get true conditions
+    conditions = resolve_conditions(project, values)
+
+    # compute sets from values
+    sets = compute_sets(values)
 
     # count the total number of questions, taking sets and conditions into account
-    total_count, attributes = count_questions(project.catalog, sets, conditions)
+    total, attributes = count_questions(project.catalog, sets, conditions)
 
     # filter the project values for the counted questions and exclude empty values
-    values_count = project_values.filter(attribute__in=attributes) \
-                                 .exclude((Q(text='') | Q(text=None)) & Q(option=None) &
-                                          (Q(file='') | Q(file=None))) \
-                                 .count()
+    count = values.filter(attribute_id__in=attributes) \
+                  .exclude((Q(text='') | Q(text=None)) & Q(option=None) &
+                           (Q(file='') | Q(file=None))) \
+                  .values_list('attribute', 'set_index').distinct().count()
 
-    return values_count, total_count
+    return count, total
 
 
 def count_questions(parent_element, sets, conditions):
@@ -58,11 +119,11 @@ def count_questions(parent_element, sets, conditions):
             if not element_conditions or element_conditions.intersection(conditions):
                 if isinstance(element, Question):
                     if not element.is_optional:
-                        attributes.append(element.attribute)
+                        attributes.append(element.attribute_id)
                         count += 1
                 else:
-                    if element.attribute:
-                        attributes.append(element.attribute)
+                    if element.attribute_id:
+                        attributes.append(element.attribute_id)
 
                     element_count, element_attributes = count_questions(element, sets, conditions)
                     set_count = count_sets(element, sets)
@@ -75,7 +136,7 @@ def count_questions(parent_element, sets, conditions):
 
 def count_sets(parent_element, sets):
     if parent_element.is_collection:
-        if parent_element.attribute:
+        if parent_element.attribute_id:
             count = len(sets[parent_element.attribute_id])
         else:
             count = 0
diff --git a/rdmo/projects/serializers/v1/overview.py b/rdmo/projects/serializers/v1/overview.py
index a0428b9836..cc5cfdf3e2 100644
--- a/rdmo/projects/serializers/v1/overview.py
+++ b/rdmo/projects/serializers/v1/overview.py
@@ -1,51 +1,18 @@
 from rest_framework import serializers
 
 from rdmo.projects.models import Project
-from rdmo.questions.models import Catalog, Page, Section
-
-
-class PageSerializer(serializers.ModelSerializer):
-
-    class Meta:
-        model = Page
-        fields = (
-            'id',
-            'title',
-            'has_conditions'
-        )
-
-
-class SectionSerializer(serializers.ModelSerializer):
-
-    pages = serializers.SerializerMethodField()
-
-    class Meta:
-        model = Section
-        fields = (
-            'id',
-            'title',
-            'pages'
-        )
-
-    def get_pages(self, obj):
-        return PageSerializer(obj.elements, many=True, read_only=True).data
+from rdmo.questions.models import Catalog
 
 
 class CatalogSerializer(serializers.ModelSerializer):
 
-    sections = serializers.SerializerMethodField()
-
     class Meta:
         model = Catalog
         fields = (
             'id',
-            'title',
-            'sections'
+            'title'
         )
 
-    def get_sections(self, obj):
-        return SectionSerializer(obj.elements, many=True, read_only=True).data
-
 
 class ProjectOverviewSerializer(serializers.ModelSerializer):
 
diff --git a/rdmo/projects/serializers/v1/page.py b/rdmo/projects/serializers/v1/page.py
index 838cfe4591..33f0412ca8 100644
--- a/rdmo/projects/serializers/v1/page.py
+++ b/rdmo/projects/serializers/v1/page.py
@@ -171,6 +171,7 @@ def get_section(self, obj):
         return {
            'id': section.id,
            'title': section.title,
+           'first': section.elements[0].id if section.elements else None
         } if section else {}
 
     def get_prev_page(self, obj):
diff --git a/rdmo/projects/static/projects/js/project_questions/services.js b/rdmo/projects/static/projects/js/project_questions/services.js
index 9303fed91f..e57a3616ae 100644
--- a/rdmo/projects/static/projects/js/project_questions/services.js
+++ b/rdmo/projects/static/projects/js/project_questions/services.js
@@ -9,7 +9,7 @@ angular.module('project_questions')
     /* configure resources */
 
     var resources = {
-        projects: $resource(baseurl + 'api/v1/projects/projects/:id/:detail_action/'),
+        projects: $resource(baseurl + 'api/v1/projects/projects/:id/:detail_action/:detail_id/'),
         values: $resource(baseurl + 'api/v1/projects/projects/:project/values/:id/:detail_action/'),
         pages: $resource(baseurl + 'api/v1/projects/projects/:project/pages/:list_action/:id/'),
         settings: $resource(baseurl + 'api/v1/core/settings/')
@@ -147,13 +147,14 @@ angular.module('project_questions')
             }
 
             return service.fetchPage(page_id)
+            .then(service.fetchNavigation)
             .then(service.fetchOptions)
             .then(service.fetchValues)
             .then(service.fetchConditions)
             .then(function () {
                 // copy future objects
                 angular.forEach([
-                    'page', 'progress', 'attributes', 'questionsets', 'questions', 'valuesets', 'values'
+                    'page', 'progress', 'attributes', 'questionsets', 'questions', 'valuesets', 'values', 'navigation'
                 ], function (key) {
                     service[key] = angular.copy(future[key]);
                 });
@@ -276,6 +277,16 @@ angular.module('project_questions')
         });
     };
 
+    service.fetchNavigation = function() {
+        future.navigation = resources.projects.query({
+            id: service.project.id,
+            detail_id: future.page.section.id,
+            detail_action: 'navigation'
+        });
+
+        return future.navigation.$promise
+    };
+
     service.initPage = function(page) {
         // store attributes in a separate array
         if (page.attribute !== null) future.attributes.push(page.attribute);
@@ -868,16 +879,7 @@ angular.module('project_questions')
                 } else if (angular.isDefined(page)) {
                     service.initView(page.id);
                 } else if (angular.isDefined(section)) {
-                    if (angular.isDefined(section.pages)) {
-                        service.initView(section.pages[0].id);
-                    } else {
-                        // jump to first page of the section in breadcrumb
-                        // let section_from_service = service.project.catalog.sections.find(x => x.id === section.id)
-                        var section_from_service = $filter('filter')(service.project.catalog.sections, {
-                            id: section.id
-                        })[0]
-                        service.initView(section_from_service.pages[0].id);
-                    }
+                    service.initView(section.first);
                 } else {
                     service.initView(null);
                 }
@@ -886,16 +888,7 @@ angular.module('project_questions')
             if (angular.isDefined(page)) {
                 service.initView(page.id);
             } else if (angular.isDefined(section)) {
-                if (angular.isDefined(section.pages)) {
-                    service.initView(section.pages[0].id);
-                } else {
-                    // jump to first page of the section in breadcrumb
-                    // let section_from_service = service.project.catalog.sections.find(x => x.id === section.id)
-                    var section_from_service = $filter('filter')(service.project.catalog.sections, {
-                        id: section.id
-                    })[0]
-                    service.initView(section_from_service.pages[0].id);
-                }
+                service.initView(section.first);
             } else {
                 service.initView(null);
             }
diff --git a/rdmo/projects/templates/projects/project_questions_navigation.html b/rdmo/projects/templates/projects/project_questions_navigation.html
index f5945d8db2..6f9a1f2eb9 100644
--- a/rdmo/projects/templates/projects/project_questions_navigation.html
+++ b/rdmo/projects/templates/projects/project_questions_navigation.html
@@ -3,22 +3,27 @@
 {% include 'projects/project_questions_navigation_help.html' %}
 
 <ul class="list-unstyled project-questions-overview">
-    <li ng-repeat="section in service.project.catalog.sections">
+    <li ng-repeat="section in service.navigation">
         <a href="" ng-click="service.jump(section)">
             {$ section.title $}
         </a>
 
         <ul class="list-unstyled"
-            ng-show="section.id == service.page.section.id">
+            ng-show="section.pages">
             <li ng-repeat="page in section.pages"
                 ng-class="{'active': page.id == service.page.id}">
 
-                <a href="" ng-click="service.jump(section, page)">
+
+                <a href="" ng-click="service.jump(section, page)" ng-show="page.show">
                     <span>{$ page.title $}<span>
-                    <span ng-show="page.has_conditions" class="small">
-                        <i class="fa fa-question-circle-o small" aria-hidden="true"></i>
+                    <span ng-show="page.count == page.total">
+                        <i class="fa fa-check" aria-hidden="true"></i>
                     </span>
+                    <span ng-show="page.count > 0 && page.count != page.total">
+                        ({$ page.count $} of {$ page.total $})
+                    <span>
                 </a>
+                <span class="text-muted" ng-hide="page.show">{$ page.title $}<span>
             </li>
         </ul>
     </li>
diff --git a/rdmo/projects/templates/projects/project_questions_navigation_help.html b/rdmo/projects/templates/projects/project_questions_navigation_help.html
index 73e58ea1a8..60abef29bf 100644
--- a/rdmo/projects/templates/projects/project_questions_navigation_help.html
+++ b/rdmo/projects/templates/projects/project_questions_navigation_help.html
@@ -12,6 +12,6 @@
 
 <p class="help-block">
 {% blocktrans trimmed %}
-Entries with <i class="fa fa-question-circle-o small" aria-hidden="true"></i> might be skipped based on your input.
+Grey entries will be conditionally skipped based on your input.
 {% endblocktrans %}
 </p>
diff --git a/rdmo/projects/viewsets.py b/rdmo/projects/viewsets.py
index 9824eaf722..eac1226412 100644
--- a/rdmo/projects/viewsets.py
+++ b/rdmo/projects/viewsets.py
@@ -1,6 +1,6 @@
 from django.conf import settings
 from django.contrib.sites.shortcuts import get_current_site
-from django.db.models import prefetch_related_objects
+from django.core.exceptions import ObjectDoesNotExist
 from django.http import Http404, HttpResponseRedirect
 from django.utils.translation import gettext_lazy as _
 
@@ -8,7 +8,6 @@
 from rest_framework.decorators import action
 from rest_framework.exceptions import NotFound
 from rest_framework.mixins import CreateModelMixin, ListModelMixin, RetrieveModelMixin, UpdateModelMixin
-from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
 from rest_framework.reverse import reverse
 from rest_framework.viewsets import GenericViewSet, ModelViewSet, ReadOnlyModelViewSet
@@ -27,7 +26,7 @@
 from .filters import SnapshotFilterBackend, ValueFilterBackend
 from .models import Continuation, Integration, Invite, Issue, Membership, Project, Snapshot, Value
 from .permissions import HasProjectPagePermission, HasProjectPermission, HasProjectsPermission
-from .progress import compute_progress
+from .progress import compute_navigation, compute_progress
 from .serializers.v1 import (
     IntegrationSerializer,
     InviteSerializer,
@@ -66,17 +65,27 @@ class ProjectViewSet(ModelViewSet):
     def get_queryset(self):
         return Project.objects.filter_user(self.request.user).select_related('catalog')
 
-    @action(detail=True, permission_classes=(IsAuthenticated, ))
+    @action(detail=True, permission_classes=(HasModelPermission | HasProjectPermission, ))
     def overview(self, request, pk=None):
         project = self.get_object()
-
-        # prefetch only the pages (and their conditions)
-        prefetch_related_objects([project.catalog],
-                                 'catalog_sections__section__section_pages__page__conditions')
-
         serializer = ProjectOverviewSerializer(project, context={'request': request})
         return Response(serializer.data)
 
+    @action(detail=True, url_path=r'navigation/(?P<section_id>\d+)',
+            permission_classes=(HasModelPermission | HasProjectPermission, ))
+    def navigation(self, request, pk=None, section_id=None):
+        project = self.get_object()
+
+        try:
+            section = project.catalog.sections.get(pk=section_id)
+        except ObjectDoesNotExist:
+            raise NotFound()
+
+        project.catalog.prefetch_elements()
+
+        navigation = compute_navigation(section, project)
+        return Response(navigation)
+
     @action(detail=True, permission_classes=(HasModelPermission | HasProjectPermission, ))
     def resolve(self, request, pk=None):
         snapshot_id = request.GET.get('snapshot')