ACROSS
- River confluence and home to a mighty pororoca (5)
- The mean tidal range is four to six metres (9)
- The hypothetical tidal bulge is one of these waves (8)
- Tide heights for the Humber estuary measured from here (9)
- All points within and upon the earth follow a circular path around common center of mass (12)
- Bore surfing pioneer on the might Chinese dragon (8)
- River experiencing a small bore near Amherst Point in Nova Scotia (6)
- Number of perigee-syzygy cycle peaks in 2000 (3)
- You might find a god in the bore (2)
- Discover of the only universe visible to the naked eye (in Andromeda) (7)
- Moon (adj) (5)
- The tide retreats (3)
- Tidal range in excess of four metres (10)
- Tides occuring when sun and moon in quadrature (4)
- Estuary fed by a popular surfing river in France (7)
- Largest tidal bore in history (picture bottom left) (8)
- A wave caused by meterological disturbances (7)
- Wave throwing water out in front as it hits the banks (7)
- Variation in semidiurnal tides (5)
- Largest tidal range in the world occurs here (5)
- (Former) home of the Pegu and Sittang bores (5)
- Sun, earth and moon are in line (6)
- Celestial cause of variation in tidal oscillation at varying latitudes (11)
- The lesser of two most influential celestial bodies upon the oceans (3)
- Revolutionary scientific astronomer (6)
- The equilibrium theory of tides came from this apple picker (6)
- The moon is as far away as possible (6)
- Main bore-river in Malaysia (pic bottom right) (5)
- Dominates the surface of the Alaskan fjords in winter (3)
- Famous bore from central southern Asia (illustration top left) (7)
- See 67 across (3)
- Destructive bore river draining into the large basin of the Suderbahns (6)
- Period of time calculated using celestial bodies as reference points (8)
- Large Alaskan fjord exhibiting the only bore in North America (9,3 [57 across])
- The sun passes from south to north over the equator (6)
- The moon and sun do to this (4)
- The historical animal associated with the world's largest bore (6)
- One of the dynamic tide propounders (9)
- Only one of these celestial bodies affects our tides (4)
- Amazonian river experiencing large bore inland(4)
- Stand still and you are moving in this direction (4)
- Country of origin of the Ganges (5)
- Waters exhibiting the same stage of the tide are joined by these lines (7)
- Sun is at minimum height in the sky (8)
- Geometrical line joining the closest and farthest points of the moon's orbit (4)
- The swishing action of ocean tides around a fixed central origin (11)
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DOWN
- Moon wanning towards new (8)
- Former super bore of Europe occurred on this river (5)
- The Anchorage fjords are the _ _ _ 's of the Cook Inlet (3)
- Moon at start of a lunar month (3)
- Surfing manouvere to return to the most critical part of the wave (3)
- Rowbotham's analogy of river topography necessary for bores to arise (6)
- Home of the world's largest bore (5)
- The moon's orbit intersects the earth-sun-orbit plane (4)
- The second largest bore in the UK occurs on this river (5)
- The part of the wave a surfer tries to avoid (slang) (4)
- The equilibrium motion of waves (8)
- The local name for bore in 14 down (5)
- The non-circular orbit of the earth and moon (6)
- The october hunter (4)
- A bit of bore etymology (4)
- The earth's path around the sun (8)
- The principle cause of the tides (7)
- This sacred time heralds the largest bores (7)
- The founding forefather of the sport of bore surfing (9)
- The Celts would see her riding the bore of the River Severn (7)
- If you want to join the crowds to surf, this river would be a good bet! (8)
- Calcutta bore (5)
- Go surfing with Robert, he talks a lot (anag.) (4)
- The remote river feeding the Gulf of Papua (3)
- When bore surfing you want to avoid these at all costs! (4)
- The lunar month (7)
- High water occuring only once daily (7)
- Think of a numer! (3)
- Holder of the BSA distance surfing record of 5.7 miles (6)
- Sun, Moon and Earth are all in an exact line (7)
- Moon passes its closest orbit to the earth - we could be in for some big tides! (7)
- Source of Bay Of Fundy and Europe's tides (8)
- Moon's dark shadow, like August 1999 (5)
- The celestial bodies return to sleep here (4)
- A slow breaking bore wave that rolls its way upriver (7)
- This cliff sends the bore back downriver at the start of the Severn horseshoe bend (4)
- The local bay associated with the Silver Dragon (8)
- Large bore in Amapa state, Brazil (8)
- Montague Island sits at the mouth of a river in this country (6)
- Prevailing winds dominating the coast of north Brazil (8)
- The nineteen year lunar cycle to the day (nearly) (7)
- Propounder of the Dynamic theory of tides (7)
- Directly beneath your feet in astronomical terms (5)
- Small sister bore in Papua New Guinea, apparantly (?) (6)
- Approximate duration of the perigee-syzygy cycle in years (4)
- 150 million kilometers from the earth (5)
- A brief period of non-motion before the river starts to ebb (5)
- The same name as for 17 down (5)
- A principle influence for the cessation of bores (3)
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