Use an SMB on boat dives and shore dives where boat traffic exists. Confirm oxygen, radio or phone coverage, emergency plans, and nearest recompression pathway before remote or north-coast diving. In the Canaries, choose sites by wind exposure and surge. In the Mediterranean, watch thermoclines, fishing lines, and crowded summer boat lanes. In northern Spain, treat swell, tide, and cold exposure as primary planning factors. After scuba, keep conservative no-fly intervals before inter-island or mainland flights.

Spain has strong emergency medical coverage in major cities and coastal hubs, but island, park, and remote-cove incidents still depend on fast communication and operator procedures. Call 112 for emergencies, use Salvamento Maritimo for maritime distress, and contact DAN Europe for dive-specific medical guidance. Hyperbaric access exists in several coastal and island regions, but the nearest chamber and transfer route should be confirmed locally before technical, deep, remote, or multi-day dive plans.

Do not touch, feed, chase, or collect marine life. Avoid standing on Posidonia or dragging anchors across seagrass. Follow reserve briefings exactly: some zones ban scuba, apnea, cave entry, anchoring, night diving, spearfishing, or any extraction. Canary angel sharks and rays should be observed passively. Whale-watching trips should use authorized operators and keep respectful distances. In national parks and Natura 2000 areas, visitor caps and no-take zones are conservation tools, not inconveniences.