This is the most common question about Nauticare, and there are only four answers. Work through them in order.
1. The yacht does not have that module
Whole areas of the app are licensed per yacht. If the yacht has no Finance module there is no Finance entry in the sidebar, for anybody aboard, captain included. A colleague who has it is almost always on a different yacht on a different licence.
Modules — why your sidebar differs lists which module unlocks which entry. A management user can check the yacht's licence at Vessel Settings → Subscription; crew do not see that tab, so ask the office. Changing a licence is a billing decision and needs a Management Admin.
2. Your role or permissions do not include it
Within the areas a yacht does have, a crew member's access is granted permission by permission. Two people on the same yacht can therefore see different menus and different numbers on the same page — counts are only ever taken over records you are allowed to see.
Captains, Management Admins and Management Users are not limited this way. A Viewer or a Management Viewer can look but not change, so on most pages the add, edit and delete buttons are hidden for them — Database → Vessel Profiles, for example, opens for a Management Viewer without its Add New button. Your own certificates, passport and forms are always on your Account page; seeing a colleague's is what needs a permission. The Roles and Permissions section explains the model, and each feature section lists the permissions that gate it.
3. You are in the wrong place
Records belong to one yacht. If you are looking at yacht A, you will not find yacht B's crew, documents or tasks — go back to Fleet and open the other yacht. Likewise, the company Database, Users and Billing exist only in the company area, so crew never see them; and an owner sees only their own portal.
4. The company subscription has lapsed
If the company's subscription has run out — including a free trial that has ended — the sidebar empties for crew and management users alike, Nauticare AI stops working and nothing new can be saved apart from your own details and documents on your Account page, whatever your permissions. In the company area a Management Admin is taken to Billing to put it right; other management users just see the empty sidebar. Inside a yacht everyone, a Management Admin included, is taken to their Account page, which says the vessel has no active plan and to contact management. Only a failed renewal payment gives a short grace period first, during which management users see a Payment Issue banner in the company area. See the Billing section.
And one that is not about visibility
On a yacht running the on-board app, Maintenance, Tasks and Inventory are visible in the cloud but read-only — the pages are all there, the edit buttons are not. That is by design; those edits are made aboard. See Where Nauticare runs.