The goal of this cross-sectional descriptive observational study is to assess the extent of self-medication among the crews of surface ships at the Toulon naval base. This study could include healthy volunteers, or participants with well-controlled chronic pathologies enabling them to be fit for embarkation, who are currently being deployed for at least 4 weeks on a surface ship at the naval base.

Participants will tick and complete a questionnaire (between 15 and 30 minutes) after 4 consecutive weeks on the ship.

Inclusion Criteria:

• French military personnel;
• age > 18;
• embarked on a French navy vessel from the naval base;
• for a minimum 4-week mission;
• covered by social security.

Exclusion Criteria:

• Refusal to participate,
• Legionnaire
• Military Health Services member

healthy volunteers, or participants with well-controlled chronic pathologies enabling them to be fit for embarkation, military personnel currently deployed for at least 4 weeks on a naval base surface ship